A member of the Christian Democratic Union (CDU), Schuster has been serving as State Minister of Internal Affairs in the government of Minister-President Michael Kretschmer since 2022.

From 1986 to 1992 he studied economics at the Fernuniversität Hagen, and he subsequently passed the career certificate for the higher service at the college of police in Münster.

In the negotiations to form a fourth coalition government under Chancellor Angela Merkel following the 2017 federal elections, Schuster was part of the working group on migration policy, led by Volker Bouffier, Joachim Herrmann and Ralf Stegner.

[11] In addition to his committee work, each year Schuster awarded a scholarship under the Parliamentary Sponsorship Program to students or young professionals in his constituency.

[12] During the European refugee crisis in autumn 2015 and afterwards, Schuster became one of the most outspoken CDU internal critics of Chancellor Angela Merkel.

[15] Ahead of the Christian Democrats’ leadership election, Schuster publicly endorsed in 2020 Jens Spahn to succeed Annegret Kramp-Karrenbauer as the party’s chair.