[1] He served as Parliamentary State Secretary in the Federal Ministry of Finance in the coalition government of Chancellor Olaf Scholz from 2021 until November 2024.

[2] After graduating from high school in 1999 at the Goldberg Gymnasium in Sindelfingen, Toncar first did his military service in the 220 communications regiment in Donauwörth and studied law in Regensburg from 2000.

In the negotiations to form a coalition government of the FDP and the Christian Democrats (CDU together with the Bavarian CSU) following the 2009 federal elections, Toncar was part of the FDP delegation in the working group on foreign affairs, defense, Europe and development policy, led by Franz Josef Jung and Werner Hoyer.

When the FDP failed to re-enter the German Bundestag in the 2013 elections, Toncar returned to the private sector and worked for the Frankfurt office of international commercial law firm Freshfields Bruckhaus Deringer from March 2014 to October 2017.

[4] In this capacity, he was a member of the parliament's Council of Elders, which – among other duties – determines daily legislative agenda items and assigns committee chairpersons based on party representation.