Secretary General of the CDU, 2013–2018

On 16 December 2013, Tauber was appointed preliminarily as Secretary General of the CDU by the party's chairwoman Angela Merkel; he succeeded Hermann Gröhe, who had been appointed Health Minister after the elections. On 5 April 2014, he was formally elected on the CDU federal party convention, with a record result of 97 percent. Tauber stated after his election that the CDU needed more young people, more women and more migrants within its ranks.^[1] During his time in office, he set up a commission tasked with drafting proposals for reforming the party between 2013 and 2017.^[2]

In the negotiations to form a coalition government with the Christian Social Union in Bavaria (CSU), the Free Democratic Party (FDP) and the Green Party following the 2017 national elections, Tauber would have been part of the 19-member delegation of the CDU, had it not been for a serious illness with emergency surgery. In February 2018 he tendered his resignation as his party's Secretary General,^[3] to be succeeded by Annegret Kramp-Karrenbauer.

Parliamentary Secretary of State at the Federal Ministry of Defense, 2018–2021

Following the 2017 elections, Tauber was appointed Parliamentary State Secretary at the Federal Ministry of Defence, under the leadership of minister Ursula von der Leyen.

In October 2020, Tauber announced that he would not stand in the 2021 federal elections but instead resign from active politics by the end of the parliamentary term.^[4] Due to illness, he resigned from his political offices in April and May 2021.^[5]

Government agencies

• Federal Agency for Civic Education (BpB), Substitute Member of the Board of Trustees (2009-2013)

Non-profit organizations

• Center for International Peace Operations (ZIF), Member of the Supervisory Board (2018–2021)^[7]
• German Foundation for Peace Research (DSF), Member of the Board (2018–2021)^[8]
• Friends of Yad Vashem, Member
• Deutsches Kinderhilfswerk, Member of the Board (since 2013)^[9]
• Jewish Museum Berlin, Member of the Board of Trustees^[10]
• Konrad Adenauer Foundation (KAS), Member of the Executive Board
• ZDF, Member of the Television Board (-2016)

Telecommunications data retention

Until 2013, Tauber was considered to be an opponent of telecommunications data retention,^[11][12] whereas the majority in his party wanted to introduce a new bill,^[13] but this was impossible because from 2009 to 2013 the CDU was in coalition with the FDP, that was opposed to telecommunications data retention. But in December 2013 the CDU formed a Grand coalition with the SPD and Tauber had been nominated as general secretary of the CDU on 16 December 2013 and since January 2014 Tauber had changed his position and actively supported a new bill against a reluctant Minister of Justice from the SPD.^[14] In October 2015 the bill was approved by the Bundestag and in November 2015 by the Bundesrat of Germany and is now law.

"Operation Kaninchenjagd"

Operation Kaninchenjagd ("Operation rabbit hunting") is one of two titles of an anonymous paper^[15] that became public in September 2016 and led to accusations against the politician Peter Tauber. It is alleged that Tauber – who was at that time member of the CDU and the (regional) chairman of the Young Union in Hesse – was involved in (attempted) bullying of another member and employee of the Christian Democratic Party.

Insulting mini jobbers

In July 2017, Tauber argued that someone who has a proper education does not have to work as a so-called mini jobber (marginal employment). This statement was criticized heavily by other politicians, the media and trades unions. In Germany, millions of workers are dependent on this type of employment to make a living due to economic liberalization implemented a decade ago.^{[16][17][18][19]}