Since 2009, Linnemann has been serving on the Committee on Labor and Social Affairs, where he is his parliamentary group's
rapporteur on welfare payments (
Arbeitslosengeld II). In the negotiations to form a
Grand Coalition of the Christian Democrats (
CDU together with the Bavarian
CSU) and the
Social Democrats (SPD) following the
2013 federal elections, Linnemann was part of the CDU/CSU delegation in the working group on labor policy, led by
Ursula von der Leyen and
Andrea Nahles. In similar talks following the
2017 federal elections, he was again part of the working group on social affairs, this time led Nahles,
Karl-Josef Laumann and
Barbara Stamm. However, he later abstained in the party leadership's vote on endorsing the renewed
grand coalition under
Chancellor Angela Merkel. From 2018 to 2021, Linnemann served as deputy chairman of the
CDU/CSU parliamentary group under the leadership of successive chairmen
Volker Kauder and
Ralph Brinkhaus. In this capacity, he oversaw the group's initiatives on economic policy, small and medium businesses, tourism and energy. Since 2022, Linnemann has been leading a working group – alongside
Serap Güler and
Mario Voigt – in charge of drafting the CDU's new
party platform. ==Other activities==