Siemtje Möller

Siemtje Victoria Regine Ilse Santjer Möller (born 20 July 1983 in Emden) is a German teacher and politician of the Social Democratic Party of Germany (SPD). She has been a member of the Bundestag since 2017 for the constituency of Friesland – Wilhelmshaven – Wittmund in Lower Saxony, a seat she won directly in 2017, 2021 and 2025. On 8 December 2021, the day Olaf Scholz was elected chancellor and Christine Lambrecht became defence minister, Lambrecht appointed Möller Parliamentary State Secretary at the Federal Ministry of Defence, together with Thomas Hitschler, in succession to Thomas Silberhorn. The ministry later recorded that she held the office from December 2021 to May 2025. When Friedrich Merz took office on 6 May 2025, the parliamentary state secretaries named for the defence ministry were Nils Schmid and Sebastian Hartmann. On 7 May 2025 the SPD parliamentary group elected Möller one of its deputy chairs, with 85 votes in favour out of 117 cast, responsible for foreign policy, defence policy, economic cooperation and development, human rights and European policy.

Möller took the Abitur in 2003 at the Liebfrauenschule in Oldenburg. From April 2004 to September 2011 she studied for a grammar-school teaching degree in French, Spanish and politics at the University of Göttingen and passed the first state examination. A training placement at the Ratsgymnasium Wolfsburg, from January 2012 to July 2014, ended with the second state examination. She taught social studies and French at the Oberstufenzentrum for motor-vehicle trades in Berlin-Charlottenburg from July 2014 to July 2016. Since August 2016 she has been a Studienrätin at the Neues Gymnasium in Wilhelmshaven, in French, politics and economics, and Spanish, and is released from classroom duties while she sits in the Bundestag. She is married and has two children.

At the election of 24 September 2017 she defeated the sitting CDU member Hans-Werner Kammer, taking 54,504 first votes (39.7 percent) to his 44,537 (32.4 percent). In 2021 she was returned with 60,392 first votes (45.4 percent); Anne Janssen of the CDU placed second with 29,286 (22.0 percent). On 23 February 2025 she held the constituency with 52,918 first votes (35.4 percent), ahead of Janssen on 26.8 percent and the Alternative for Germany candidate on 19.7 percent, while turnout rose to 81.1 percent of 185,864 eligible voters.

At the time of the 2021 appointment the defence ministry described her as a spokesperson of the Seeheimer Kreis since June 2020 and as the SPD group's defence-policy spokesperson since January 2021, and noted her work on the investigative committee into consultant contracts at the ministry. In November 2025 Boris Pistorius, then defence minister, marked her departure from the ministry with a serenade by the Wilhelmshaven naval band. The ministry's account of that ceremony quoted him on her years on the Bundestag defence committee, her time as the group's defence spokesperson, and her subsequent work in the Bendlerblock for the Bundeswehr.

Early life and education

Childhood and schooling

For the 2025 federal election the federal returning officer recorded the candidate elected in Friesland – Wilhelmshaven – Wittmund as Siemtje Victoria Regine Ilse Santjer Möller. Official biographies give her birth as 20 July 1983 in Emden, a seaport in East Frisia, Lower Saxony.

In 2003 she passed the Abitur, the general higher-education entrance qualification, at the Liebfrauenschule in Oldenburg. The Liebfrauenschule is a state-recognized Catholic Gymnasium for girls and boys, sponsored by the Roman Catholic Church in the Oldenburg part of the Diocese of Münster; its leaving certificates have the same standing as those of public Gymnasien.

A May 2022 profile in the weekly der Freitag reported that her parents had become teachers by a second-chance route and that she meant to follow them into the profession. In 2024, speaking to a class at the Marion-Dönhoff-Schule in Wilhelmshaven, she placed the start of her political interest in her own school years: she and a classmate painted placards and the two of them demonstrated against whaling. On 15 February 2003, aged 19, she was in the crowd in Berlin for one of the large demonstrations against the invasion of Iraq then being prepared under George W. Bush. The same profile says she was strongly impressed by Chancellor Gerhard Schröder’s statement that, under his leadership, Germany would not be available for adventures.

University and internships

A curriculum vitae published by the Federal Foundation for the Reappraisal of the SED Dictatorship records that in 2003–2004 she took the programme “Technische Redaktion” (technical editing) in informatics and communication studies at RWTH Aachen University. From April 2004 to September 2011 she studied at the University of Göttingen for the Gymnasium teaching qualification in French, Spanish and politics, and she passed the first Staatsexamen.

The Göttingen years overlapped with plans by Lower Saxony’s CDU–FDP government to charge tuition fees. Der Freitag reported that she organized protest events and made films against a proposal she called a way of making education a privilege of the wealthy, and that from 2006 students paid 500 euros a semester. She later told the Wilhelmshaven class that the state government introduced the fees anyway, which showed her that such decisions were taken in parliaments and in the parties represented there. According to the profile, an approach to the Greens went unanswered and an invitation from the Social Democratic Party followed; she joined the SPD formally only in 2010, at the age of 27.

From October 2008 to March 2011 she was a tutor in Göttingen’s seminar for political science, at Walter Reese-Schäfer’s chair for the history of political ideas. Her Bundestag biography, which is based on members’ own disclosures, states that she designed and led an interdisciplinary English-language seminar on Model United Nations, focused on the Security Council of the United Nations, and that the course took first place in the social-science faculty’s teaching prize for the winter semester 2009/2010.

The same biography lists internships at the United Nations, at BBJ Consulting in Brussels and at the World Bank. The Freitag profile places the United Nations internship in New York and the World Bank internship in Washington, D.C., and describes the Brussels placement as work at a political consultancy.

Teacher training

Teacher education in Germany continues after the first state examination with a practical preparatory service, the Referendariat, which ends in a second state examination. From January 2012 to July 2014 Möller did that service through the Studienseminar Wolfsburg, with the school placement at the Ratsgymnasium in Wolfsburg, and she passed the second Staatsexamen. The foundation’s published curriculum records the same years, the same school and the same examination.

Teaching career

Berlin and Wilhelmshaven

From July 2014 to July 2016 Möller taught in Berlin. The Bundestag biography, which notes that its biographical details rest on members' own information, lists her as a teacher (Lehrerin) at the Oberstufenzentrum KFZ in Charlottenburg, in social studies (Sozialkunde) and French. A curriculum vitae on her website, last modified in May 2025, gives the same school, dates and subjects but calls that Berlin post a Studienrätin appointment. The Oberstufenzentrum Kraftfahrzeugtechnik, at Gierkeplatz 1 and 3, trains apprentices in motor-vehicle, two-wheeler and bicycle occupations and also offers general education and a Fachoberschule.

In August 2016 she became a Studienrätin at the Neues Gymnasium in Wilhelmshaven, teaching French, politics and economics (Politik und Wirtschaft), and Spanish. The school is a state Gymnasium at Mühlenweg 63/65, on the Bildungscampus am Mühlenweg. The biography records the appointment as continuing ("August 2016 bis heute"), with the parenthetical note "z.zt. freigestellt".

The Nordwest-Zeitung, reporting her nomination as a candidate of the Social Democratic Party of Germany, described her in December 2016 as a teacher of politics, economics, French and Spanish at a Wilhelmshaven Gymnasium who had newly moved from Emden to Varel. An October 2016 report had already identified her as a teacher in Wilhelmshaven who had moved to Varel in the middle of that year. She has been a member of the Bundestag since 2017, so the Wilhelmshaven appointment began more than a year before the mandate.

Leave from the classroom

The disclosure of activity before membership in the Bundestag lists one prior post: the Land of Lower Saxony, Hanover, as Studienrätin at a Gymnasium, with a right of return (Rückkehrrecht). The Bundestag youth site mitmischen.de gives her profession as Lehrerin. Under section 5 of the Members of the Bundestag Act (Abgeordnetengesetz), the rights and duties arising from the service relationship of a salaried civil servant elected to the Bundestag rest for the duration of membership, except the duty of official secrecy and the ban on accepting rewards and gifts; the civil servant may use the official title with the addition "außer Dienst" ("a. D."). That suspension runs from the day the Federal Electoral Committee establishes the result, or from acceptance of the mandate, and at most until retirement. Section 6 then keeps those rights and duties at rest for at most six further months after membership ends. On an application filed within three months, the civil servant is reinstated, at the latest three months after the application, in the former service relationship, in an office of the same or an equivalent career track and with at least the same final basic salary, and receives the pay of the last-held office from the date of the application. The published "freigestellt" and the disclosed Rückkehrrecht are the record of that suspended Lower Saxony post.

Party and local politics

Entry into the SPD

Siemtje Möller has been a member of the Social Democratic Party of Germany (SPD) since 2010. In a June 2020 interview, Der Spiegel treated the campaign against tuition fees as the reason she joined, a dispute that had marked higher-education policy in Lower Saxony while she was a student. Her first recorded party offices were at state level, not on a town or district council. The Bundestag biography lists her as an advisory member of the SPD executive in Lower Saxony from 2012 to 2014 and as a full member from 2014, before her election to parliament in 2017. A local-council seat followed only with the municipal elections of 2021.

Lower Saxony executive and the Seeheimer Kreis

She remained on the state executive after entering the Bundestag. At the Lower Saxony party congress in Wolfenbüttel on 24 May 2025 the executive was elected anew, and the state association lists Möller among the 18 additional members (Beisitzerinnen and Beisitzer).

Inside the SPD group in the Bundestag, political tendencies are associations of deputies rather than formal organs of the party. The Federal Agency for Civic Education describes the Seeheimer Kreis as the grouping with the longest tradition: an assembly of the party's right that formed in the mid-1970s in response to the growing weight of the New Left. The same account places the Parliamentary Left on the left of the group and dates Netzwerk Berlin, a smaller circle that locates itself in the centre but stands relatively close to the Seeheimer on policy, to 1998. Press reports habitually call the Seeheimer the conservative wing. In December 2024 Der Spiegel referred to Dirk Wiese as a spokesperson of the "conservative Seeheimer Kreis" and noted the circle's own claim to be the largest current in the SPD parliamentary group. Möller, once in the role, described the circle instead as a home for pragmatic politics.

On 18 June 2020 the circle elected Möller as one of its three spokespersons, in succession to Johannes Kahrs, alongside Dirk Wiese and Dagmar Ziegler. Rheinische Post reported the vote the same day and called the circle conservative. Two days later Möller told Spiegel that the Seeheimer stood for voters who thought in practical terms and would act as a stabilising factor in the parliamentary party, and that she did not intend to continue Kahrs's running arguments on Twitter.

She left the role in June 2022. On 23 June 2022 Marja-Liisa Völlers wrote that a members' meeting had unanimously elected her as Möller's successor, with Uwe Schmidt and Dirk Wiese as the other spokespersons, and that the circle then had 85 members. The statement quoted Möller as linking the handover to her work as parliamentary state secretary in the Defence Ministry after Russia's attack on Ukraine.

Varel, Friesland and the federal executive

The local mandates began while she was already a member of the Bundestag. On 12 September 2021 she was elected both to the council of Varel and to the Kreistag of the district of Friesland.

In the Varel council election the official count records her as directly elected with 3,452 votes, more than any other candidate. The SPD's combined party and candidate votes came to 14,289, or 39.73 percent, and 13 of the 32 seats. Turnout was 60.98 percent of 20,337 eligible voters. In the district election the same day she was directly elected in area I (Varel) with 4,049 votes. District-wide the SPD received 54,574 votes, 38.15 percent, and 16 of 42 seats, on a turnout of 58.49 percent. The Bundestag biography, updated in September 2026, still lists both memberships as held since 2021.

She joined the SPD federal executive in the summer of 2025. NDR reported beforehand that she was a candidate, with Boris Pistorius, Marja-Liisa Völlers and Braunschweig's lord mayor Thorsten Kornblum among the Lower Saxons seeking places. On 28 June 2025, at the ordinary federal party congress in Berlin, delegates filled 24 additional seats on the executive. The first-ballot quorum was 307 votes; Möller received 418 and was elected on that round. The party newspaper Vorwärts named her among the additional members of the new executive.

Elections to the Bundestag

The constituency and 2017

Siemtje Möller has sat in the Bundestag since 2017 for constituency 26, Friesland – Wilhelmshaven – Wittmund, in Lower Saxony, which the parliament records as a constituency mandate. The seat comprises the independent city of Wilhelmshaven and the districts of Friesland and Wittmund. It was already a direct mandate of the Social Democratic Party of Germany: in 2013 the SPD took 58,178 first votes (44.1 percent) to 52,275 (39.7 percent) for the Christian Democratic Union, and the member directly elected for the 18th Bundestag was Karin Evers-Meyer, a member of parliament since 2002.

Official map of Bundestag constituency 26, Friesland – Wilhelmshaven – Wittmund, prepared for the 2021 federal election.

Polling for the 19th Bundestag was on Sunday, 24 September 2017. The constituency electoral committee, meeting in Wilhelmshaven on 28 September, declared Möller directly elected for the SPD. Of 189,344 people eligible to vote, 139,153 did so, a turnout of 73.5 percent and 2.9 percentage points above 2013. She received 54,504 first votes, 39.7 percent of 137,343 valid first votes, 4.5 points below the SPD share in 2013.

The runner-up was Hans-Werner Kammer of the CDU, with 44,537 votes (32.4 percent), 7.2 points down on the CDU first-vote share of 2013, leaving Möller ahead by 9,967 votes. Achim Postert of the Alternative for Germany polled 11,392 (8.3 percent), Holger Onken of Die Linke 8,127 (5.9 percent), Hendrik Theemann of the Free Democratic Party 8,074 (5.9 percent) and Alexander von Fintel of Alliance 90/The Greens 7,542 (5.5 percent). On the second vote the CDU led, with 45,098 (32.8 percent) to the SPD's 42,207 (30.7 percent); the FDP had 12,958 (9.4 percent), the AfD 12,490 (9.1 percent), the Greens 9,984 (7.3 percent) and Die Linke 9,738 (7.1 percent).

2021

The next federal election was held on 26 September 2021. Turnout in the constituency fell to 71.0 percent: 134,164 of 189,047 eligible voters took part, 2.5 points fewer than in 2017. Möller won 60,392 first votes, 45.4 percent and a gain of 5.7 points, and the constituency committee on 30 September again recorded her as directly elected.

Anne Janssen of the CDU took 29,286 votes (22.0 percent). The CDU first-vote share dropped 10.4 points, and Möller's lead over Janssen was 31,106 votes, about 23.4 percentage points, the widest of her three contests. Sina Beckmann (Greens) received 13,504 (10.2 percent), Joachim Wundrak (AfD) 10,227 (7.7 percent), Hendrik Theemann (FDP) 9,502 (7.1 percent) and Hans-Henning Adler (Die Linke) 3,460 (2.6 percent). Second votes moved the same way: the SPD led with 50,448 (38.0 percent, up 7.3 points), ahead of the CDU on 28,535 (21.5 percent, down 11.3), the Greens on 17,020 (12.8 percent), the FDP on 13,874 (10.4 percent) and the AfD on 10,951 (8.2 percent).

2025

The election to the 21st Bundestag was brought forward to 23 February 2025. On 16 November 2024, at an SPD campaign opening in Jever, Möller, described by the Wilhelmshavener Zeitung as from Varel, was nominated again to contest the constituency; SPD federal chair Lars Klingbeil attended. Separately, the Lower Saxony state election committee on 24 January 2025 admitted an SPD Land list of 78 candidates. In the state returning officer's notice, published in the Niedersächsisches Ministerialblatt of 3 February 2025, she was placed second, under the name "Möller, Siemtje Victoria Regine Ilse Santjer" and with the occupation of teacher, behind Klingbeil and ahead of Boris Pistorius.

The constituency vote, not the list, returned her. The constituency committee on 27 February found that 150,806 of 185,864 eligible voters had voted, a turnout of 81.1 percent and 10.2 points above 2021, including 37,315 postal ballots. The federal returning officer names "Möller, Siemtje Victoria Regine Ilse Santjer" of the SPD as elected, with 52,918 first votes (35.4 percent), 10.1 points below 2021. Janssen was again second, on 40,095 votes (26.8 percent), a CDU gain of 4.8 points, so the margin narrowed to 12,823 votes.

Martin Sichert of the AfD received 29,533 first votes. That was 19.7 percent, and the AfD first-vote share rose 12.0 points from 2021. Ulrike Maus (Greens) had 8,630 (5.8 percent), Vincent Janßen (Die Linke) 8,246 (5.5 percent) and Robert Wegener (FDP) 3,974 (2.7 percent). On the second vote the CDU finished first, with 39,620 (26.4 percent), ahead of the SPD on 38,213 (25.5 percent, down 12.5 points) and the AfD on 30,283 (20.2 percent, up 12.0). The Greens polled 12,573 (8.4 percent), Die Linke 10,897 (7.3 percent), the Bündnis Sahra Wagenknecht 6,122 (4.1 percent) and the FDP 5,962 (4.0 percent). The direct mandate thus stayed with the SPD for a third successive election, although the party no longer led the constituency party vote.

First parliamentary term

Defence committee and the consultants inquiry

When the Defence Committee of the 19th Bundestag was constituted on 31 January 2018, Siemtje Möller of the Social Democratic Party of Germany was an ordinary member; Fritz Felgentreu was the SPD Obmann and defence-policy spokesperson. By the close of the electoral period the archived biography lists her as SPD Obfrau of the committee, an ordinary member of the Sports Committee, and a deputy member of the Foreign Affairs Committee, its disarmament subcommittee and the study commission on artificial intelligence.

In August 2018 the Bundesrechnungshof reported breaches in the Federal Ministry of Defence’s use of outside consultants, including a sample of 56 contracts worth 93.3 million euros in which need was often undocumented, efficiency tests were missing, and many awards were made without competition. On 30 January 2019, on a motion from the Free Democratic Party, Die Linke and Alliance 90/The Greens, the committee constituted itself under Article 45a (2) of the Basic Law as its first investigative committee, to examine that use of outside advice since the 18th electoral period, including responsibility in the ministry’s leadership; the CDU/CSU and the SPD abstained.

Möller was a substitute on the nine-member subcommittee that held the hearings; Dennis Rohde was the SPD speaker and Hellmich the chair. It took in more than 4,700 files and, in 17 public sessions, heard one expert and 41 witnesses, ending with former defence minister Ursula von der Leyen. Möller was nevertheless a rapporteur of printed paper 19/22400, adopted on 10 September 2020 by the subcommittee and on 16 September by the committee. The majority found that, apart from the Cyber Innovation Hub, state secretaries rather than von der Leyen usually took the decisions, though her office was informed. On 4 November 2020 she described uncontrolled access to security-relevant information, personally sponsored consultants and projects imposed against departmental advice. The FDP, the Left and the Greens dissented that von der Leyen had thereby been released from responsibility; the AfD dissented separately.

Spokesperson role and the drone debate

In 2018 the coalition agreed to lease five Heron TP drones from Israel Aerospace Industries, maintained by Airbus, while postponing any decision to arm them. Unlike the unarmed Heron 1, already used in Afghanistan and Mali, the Heron TP could carry weapons, and the coalition agreement reserved a separate Bundestag decision for after an assessment in international law, constitutional law and ethics.

On 15 December 2020 the SPD group decided not to approve arming for the time being and to hold the open-ended public debate that group chair Rolf Mützenich said the coalition agreement required and that had not taken place. He accepted that drones could protect soldiers, but warned that armed ones could lower the threshold for force. Felgentreu, who favoured arming, resigned as spokesperson the same day, writing that he could not credibly defend a line he rejected, and defence minister Annegret Kramp-Karrenbauer called the delay a reckless risk to soldiers’ lives.

By 17 December Möller had been elected the new defence-policy spokesperson. She said she personally favoured buying the armament to protect soldiers, but that a Heron TP would not be operational before 2022, that only one MANTIS system was fielded, in Mali, and that scenarios, command rules and a mandate clause had come late, with the pandemic blocking constituency debate. The house rejected a Left motion against armed drones with the votes of the Union, the SPD, the FDP and the AfD, and referred a similar Green motion to the Defence Committee.

On 15 March 2021 the SPD executive appointed a project group on arming Bundeswehr drones under former justice minister Herta Däubler-Gmelin; Möller was a member. Its report of 12 October 2021 said arming could be considered for soldiers on lawful deployments only on conditions the group adopted unanimously: no extralegal killing, a human rather than an automated decision, a published concept of operations, express authority in the Bundestag mandate, and control from the deployment area rather than from Germany. Two members did not support considering armament at all.

Parliamentary friendship groups

The Bundestag’s list of friendship-group boards for the 19th electoral period names Möller only as a deputy chair of the German-Ukrainian Parliamentary Friendship Group. Omid Nouripour of the Greens was chair; the other deputy chairs were Peter Bleser (CDU/CSU), Anton Friesen (AfD), Stephan Thomae (FDP) and Kathrin Vogler (Die Linke).

In 2019 she travelled with the group to Ukraine. A Bundestag account published in January 2020 places her in the delegation photographed in Kyiv with Nouripour and members of the other groups, alongside representatives of German political foundations and the embassy. Nouripour, who led the visit, said Ukraine should not be left alone with the conflict with Russia or with corruption after Zelenskyy’s election that year.

State secretary at the Defence Ministry

Appointment under Christine Lambrecht

On 8 December 2021, the day the cabinet of Chancellor Olaf Scholz took office, Christine Lambrecht was appointed federal minister of defence by President Frank-Walter Steinmeier and sworn in in the Bundestag. After a reception with military honours at the Bendlerblock, the Berlin seat of the Federal Ministry of Defence, she appointed Siemtje Möller parliamentary state secretary (Parlamentarische Staatssekretärin) alongside Thomas Hitschler. The Bundestag’s account of the new government listed both, for the Social Democratic Party, at the defence ministry.

They took over the work of Thomas Silberhorn, who had also been covering for Peter Tauber after Tauber left earlier in 2021. The ministry described Möller, then 38, as a Bundestag member since 2017, spokesperson of the Seeheimer Kreis since June 2020 and the SPD group’s defence spokesperson since January 2021. Parliamentary state secretaries support the minister; they do not head line departments. The organisation chart of 17 January 2022 assigned her support “in particular” for policy (Politik), cyber and information technology, armed-forces command (Führung Streitkräfte), strategy and operations (Strategie und Einsatz), and personnel. Hitschler was assigned equipment, planning, budget and controlling, legal affairs, and infrastructure, environmental protection and services.

Zeitenwende, Ukraine and NATO

Three days after Russia’s full-scale invasion of Ukraine, Scholz told a special sitting of the Bundestag on 27 February 2022 that policy had reached a Zeitenwende. He proposed a one-off special fund of €100 billion for the Bundeswehr, to be anchored in the Basic Law, and a lasting defence effort of more than 2 per cent of gross domestic product. In a written interview published by the Hankyoreh on 23 February 2023, Möller called the Russian campaign an imperialist war of aggression and said peace required refusing to tolerate it and pairing diplomacy with military strength, as in European Union and NATO support for Ukraine. She described the €100 billion fund as repairing years in which the “peace dividend” had come at the expense of military investment, and said it could not sustain capabilities without a permanent rise in spending. Germany, she said, would keep up support for Ukraine, including weapons, because Russian forces were targeting civilians, and the war had to end on terms Ukraine chose.

What Germany would send was disputed while Lambrecht was still minister. On ZDF’s Berlin direkt on 22 May 2022, Möller said NATO allies had jointly held, and jointly supported, the line that no infantry fighting vehicles or main battle tanks of Western design would be supplied, and that this had not changed. The Berliner Zeitung reported that a foreign-ministry unit replied that the claim could not be confirmed, and that the defence-committee chair, Marie-Agnes Strack-Zimmermann, said no such understanding had been discussed in committee. The SPD defence spokesperson Wolfgang Hellmich called it an informal understanding, not a formal NATO decision. A NATO spokesperson told Bild, as reported by the Münchner Merkur, that delivery of particular military goods was a national decision. Möller told the Tagesspiegel that she had only repeated the government’s recent line: no German unilateral arms moves, and the closest coordination with allies. A ministry spokesman said she had not described a formal agreement. CDU politician Johann Wadephul said parliament had not been told of any NATO decision.

By February 2023 Berlin had decided to send Leopard 2 tanks. Möller said they complemented Marder vehicles and the Panzerhaubitze 2000 but that no single system would decide the war, and that choices were made with EU and NATO partners so German defences were not hollowed out. On combat aircraft she relayed Scholz’s view that giving them up would leave Germany unable to meet NATO commitments. The Hankyoreh reported that she spoke at the Munich Security Conference on 16 February 2023.

At a December 2022 meeting of the Deutscher Bundeswehrverband in Wangerland she was asked what the Zeitenwende had delivered for equipment and people; an officer of the Bundeswehr personnel office told the meeting that 18,000 posts above the enlisted ranks were unfilled.

Service under Boris Pistorius and departure

Lambrecht resigned on 16 January 2023 after sustained criticism of how she had run the ministry. Reporting at the time treated Möller as one name in an open succession debate, not as a declared candidate. Focus wrote on 15 January that she and Eva Högl, the parliamentary commissioner for the armed forces, both had good chances. An n-tv survey the next day also listed SPD chair Lars Klingbeil, labour minister Hubertus Heil, chancellery chief Wolfgang Schmidt and Lower Saxony interior minister Boris Pistorius, and noted that Möller had held a ministerial leadership post for only about a year. Scholz chose Pistorius, whom Steinmeier appointed and who was sworn in on 19 January 2023.

Möller stayed for the rest of the Scholz government. The chart of 1 February 2024 still assigned her policy, cyber and information technology, readiness and support of the forces, military strategy and operations, and personnel; armaments, planning, budget, law and infrastructure remained with Hitschler. At a later honour, Pistorius said she had accompanied the start of the Zeitenwende, had argued that security had to be discussed in public, and that together they had passed laws meant to make the Bundeswehr a more attractive employer. He also said the Artikelgesetz Zeitenwende had laid essential legal foundations for stationing a German brigade in Lithuania.

She left with the change of cabinet, not with the change of minister. On 6 May 2025 Friedrich Merz was elected chancellor; Pistorius remained defence minister and, after the new cabinet was sworn in, bade farewell to Möller and Hitschler and appointed Nils Schmid and Sebastian Hartmann. The next day the SPD parliamentary group elected her a deputy chair, responsible for foreign policy, defence, development cooperation, human rights and European policy.

On 20 November 2025 the navy band gave her a serenade at the German Naval Museum in Wilhelmshaven. A ministry note said she had pressed modernisation especially in maritime security, personnel, and the cyber and information domain, and equal treatment in the forces, including at the 2023 Invictus Games in Düsseldorf; at the ceremony Pistorius credited her with closeness to the troops.

SPD parliamentary leadership

Deputy chair and portfolio

On 7 May 2025 the Social Democratic Party of Germany (SPD) group in the Bundestag elected its executive for the 21st legislative period. Matthias Miersch became group chair, succeeding Lars Klingbeil, with 99 yes votes out of 119 valid ballots, 18 against and two abstentions. The same sitting, with 117 ballots cast, chose six deputy chairs. Siemtje Möller received 85 yes votes and was assigned foreign policy, defence policy, economic cooperation and development, human rights, and European policy.

The vote came the day after the Bundestag elected Friedrich Merz chancellor. Möller was not reappointed to the Federal Ministry of Defence. Boris Pistorius, who stayed as defence minister, took leave of her and of Thomas Hitschler as parliamentary state secretaries; Nils Schmid and Sebastian Hartmann were named instead, and the ministry continued to list those two in the posts. The Bundestag biography records her as a deputy member of the committees on European Union affairs, economic cooperation and development, foreign affairs and defence, and as a full member of the Joint Committee (Gemeinsamer Ausschuss). In October 2026 the SPD group's published board listed her as a deputy chair with that portfolio.

Coalition talks

At the opening of coalition talks with the Christian Democratic Union of Germany (CDU) and the Christian Social Union in Bavaria (CSU) in March 2025, the SPD assigned Möller to working group 12, "Foreign affairs and defence, development cooperation and human rights." Svenja Schulze led the SPD side and Nils Schmid was deputy lead; the other members were Sanae Abdi, Falko Droßmann, Gabriela Heinrich, Frank Schwabe and Marja-Liisa Völlers.

The conscription dispute

In autumn 2025 the coalition disagreed on recruitment for the Bundeswehr. Pistorius's draft kept service voluntary, with a questionnaire and examination of whole age groups; the CDU/CSU wanted a fallback if too few volunteered. Möller and Droßmann negotiated for the SPD with Norbert Röttgen (CDU) and Thomas Erndl (CSU). Their text would draw lots to decide which young men were examined and, if necessary, called up. The press conference to present it was cancelled after resistance in the SPD group. The German press agency reported that Pistorius in particular had opposed the text, and Röttgen told the Süddeutsche Zeitung that the minister had torpedoed a bill in his own field and thrown his group into chaos. Der Spiegel reported that he rejected a lottery for examinations because he wanted every cohort examined, so the forces would know who could serve in a crisis.

At the first reading on 16 October, Pistorius said the country had to know "wer unser Land im Spannungs- und Verteidigungsfall mit welchen Qualifikationen verteidigen kann," and that any compulsory call-up would need a Bundestag decision. Tagesschau reported that Möller said a solution acceptable to all sides would be found, while Röttgen described lots as the same chance and the same risk for every man. In a joint letter, Möller, Pistorius and Droßmann wrote that "Der Grundsatz der Freiwilligkeit steht an erster Stelle," and that the Bundestag would decide on any duty.

On 12 November the four negotiators, Pistorius, and the group chairs Jens Spahn and Miersch agreed a revision. Service would stay voluntary. Men born from 2008 would be examined, with whole cohorts expected from July 2027, and would fill in a questionnaire from the new year. A personnel path to 2035, linked to NATO requirements, would be fixed in law. Missing it would not restore conscription by itself: a later statute could create a needs-based obligation, and only then was a lottery envisaged. Spiegel put the aim at about 260,000 active personnel, some 80,000 more, plus 200,000 reservists.

The Bundestag passed the Military Service Modernisation Act (Wehrdienst-Modernisierungsgesetz) on 5 December 2025 by 323 votes to 272, with one abstention. It kept service voluntary, required men born from 2008 to be examined and to answer a questionnaire that was optional for women, and allowed a needs-based duty only by a later Bundestag decision. Pistorius called the result a decisive step and said a partial obligation would follow if volunteering failed. The Bundesrat consented on 19 December. Signed on 22 December 2025 and published on 29 December as BGBl. 2025 I No. 370, the act entered into force on 1 January 2026 apart from earlier technical clauses. The government said examinations of men from the 2008 cohort would begin on 1 July 2027, and that the Bundestag could later pass a needs-based obligation if security worsened or the targets were missed.

Policy positions

Armed drones

In the Bundestag on 17 December 2020, on Left and Green motions against arming the Bundeswehr, Siemtje Möller told soldiers she favoured buying the weapons for their protection: “Ich möchte Ihnen deutlich sagen, dass ich mich für die Beschaffung der Bewaffnung ausspreche.” The leased Heron TP would not be operational before 2022, she said, and the ministry had only lately set out who would control a strike and whether it had to be in the mandate.

A German Heron TP, marked 92+52, on an airfield apron and connected to a ground-power cart.

The SPD group had just suspended the purchase, and Fritz Felgentreu had resigned as its defence spokesman. Möller defended the pause for want of a constituency debate, while the group still rejected the Left motion with the CDU/CSU, FDP and AfD. Union speakers called that a breach of the coalition agreement; the Left welcomed the delay, and Green speaker Katja Keul said arming had not been shown to beat conventional air support. On 12 January 2021 The Pioneer headlined an interview “Ich habe mich klar für die Bewaffnung ausgesprochen.”

In September 2021 she told abgeordnetenwatch she would arm the Heron TP only with a human operator in the deployment country, no fully automatic systems, no extralegal killings, a concept shown to parliament and a line in each mandate. At a Bundeswehr Association panel she warned against machines fighting while “die Menschen schauen zu”. An SPD project group under Herta Däubler-Gmelin recommended in October 2021 that arming be considered on those terms; two members dissented. She later cited the SPD–Green–FDP deal to enable armament and bar extralegal killings. On 6 April 2022 the budget committee released about €150 million for the missiles, requiring a Bundestag mandate and rules approved by the defence and foreign-affairs committees.

Alliances and Ukraine

In April 2022 she called Russia’s full-scale war a Zeitenwende and “eine neue, aber leider auch alte sicherheitspolitische Lage”. Germany, she said, could no longer rely on international law alone: “Gegen diese Bedrohung müssen wir uns wehren können.” A defence budget above €50 billion, plus the €100 billion special fund, would reach about €70 billion and pass NATO’s 2 percent of GDP.

Writing to the Hankyoreh in February 2023, she said peace required “diplomacy alongside military strength”, and that arms for Ukraine answered Russian attacks on civilians, including at Bucha. Germany stood by NATO’s 2008 Bucharest decision on Ukrainian membership, but “now is not the time” to implement it. Leopard 2 tanks would complement other arms already sent, not “turn the tide” by themselves.

In June 2025 she told the Kölnische Rundschau that the invasion had ended a rule against arms for crisis regions. Germany was “der zentrale Dreh- und Angelpunkt” for continental defence and should carry NATO’s decision to spend 3.5 percent of GDP on defence; the war required cyber defence and drones as well as artillery and tanks. After travelling to Israel with Foreign Minister Johann Wadephul in late July 2025, she wrote that the humanitarian situation in the Gaza Strip was catastrophic and that Israel would barely move without pressure. She named sanctions on far-right ministers or a partial suspension of arms exports as possible steps, while insisting Hamas free the hostages at once and that Gaza must not threaten Israel again.

Personnel, conscription and domestic security

In that June interview she said service would be voluntary “zunächst”, with incentives such as a free driving licence, because the Bundeswehr could not train tens of thousands at once.

That autumn the coalition negotiators, Möller among them, proposed mustering only as many young men as recruiting required, by lot. Defence Minister Boris Pistorius rejected a lottery in the SPD caucus in mid-October: he wanted whole cohorts on record, because conscription suspended in 2011 revives in a state of defence. The 12 November compromise, with Möller in the final round, instead set full mustering of men born in 2008 from July 2027, service staying voluntary unless the Bundestag later voted a needs-based call-up. On 5 December 2025 the Bundestag passed the Military Service Modernisation Act by 323 votes to 272. Pistorius said a partial obligation might still be needed if volunteers fell short; Green, Left and student critics objected, and the AfD called the law timid.

After explosive-laden drones were found in August 2026 at Leipzig/Halle airport, used by flights supplying Ukraine, Möller expected “ein ganzes Bündel an verschiedenen Maßnahmen” and a harder line on Russia’s shadow fleet of older tankers carrying oil under foreign flags. She told Deutschlandfunk that EU and NATO steps could include stricter environmental rules for those ships: Germany did not want a further military escalation, but had to set limits.

Maritime defence

At the Wilhelmshaven naval base in February 2024 she asked whether “die Stärke des Rechts oder das Recht des Stärkeren” would prevail. The navy, she said, had gone to sea “all in” after the attack on Ukraine and was at its limits, yet remained an “agiles, verlässliches und wirkmächtiges Mittel für die Politik”. Ukrainian strikes on the Black Sea fleet argued, in her view, for large combat ships and supply vessels and for “unbemannte, autonome Systeme in großer Zahl” under, on and over the water, bought with partners. Recruitment was the hardest problem.

Personal life and other roles

Family

The Bundestag biography, which the parliament states is based on the member's own information, gives Siemtje Möller's birth as 20 July 1983 in Emden and records that she is married with two children. The Nordwest-Zeitung reported that on 6 October 2018 she married Sören Mandel, then her partner, in a small ceremony and would keep her surname. She writes that the family lives in Varel, in the south of the district of Friesland, and that the couple have two sons. The district lies in Lower Saxony, the state of her Bundestag constituency. In December 2021 the Ostfriesen-Zeitung described the pair as sharing family responsibilities and noted that she had entered the Bundestag as the mother of an infant.

Mandel, an educator from Varel, sat for the Social Democratic Party (SPD) on the Friesland district council from the 2021 local elections, chaired the SPD group and spoke for the "Friesische Ampel", a majority with the Free Democratic Party and Alliance 90/The Greens. On 4 October 2024 he resigned the seat and those posts, writing that the step had exclusively private and family reasons.

Boards and associations

The Bundestag separately publishes posts that members must disclose. Since 2 September 2025 she has sat, unpaid, on the supervisory board of the Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) in Bonn, the federal enterprise that carries out international cooperation for the German government and has offices in Bonn and Eschborn. Until 27 September 2025 she was unpaid president of the Dachverband Maritimes Kulturgut Deutsche Feuerschiffe e.V. in Emden. The Nordwest-Zeitung reported that the association was founded in 2019 at Hamburg's Museumshafen Övelgönne to unite groups preserving historic lightships, with the stated purposes of monument protection and the promotion of art and culture, and that Möller was elected president unanimously; its seat is Emden.

At the Deutsche Atlantische Gesellschaft in Berlin, a non-partisan association that promotes public understanding of NATO, she was an unpaid ordinary executive member (Beisitzerin) until 4 November 2025 and has been unpaid vice president since 5 November 2025. She also sits, unpaid, on the political advisory board of the Wirtschaftsforum der SPD, which describes itself as a business association alongside the SPD that represents economic interests to the party.

The same self-reported note lists membership of IG Metall, the trade union for the metal and electrical industries; the Arbeiterwohlfahrt (AWO), a welfare association founded in 1919; the Seeheimer Kreis, called by the Frankfurter Allgemeine Zeitung the conservative wing of the SPD; the Atlantik-Brücke, a non-profit founded in 1952 to tie Germany to North America and Western institutions; the Deutsche Atlantische Gesellschaft; WIIS.de, the German section, founded in 2003, of Women in International Security; the Gesellschaft für Sicherheitspolitik, a voluntary association for public debate on security policy; and the Evangelische Arbeitsgemeinschaft für Soldatenbetreuung, which since 1957 has run education, family, culture and sports programmes for Bundeswehr members and their families.