He received the Walter Hug Prize for his dissertation regarding the Liechtenstein civil service law.

From 1986 to 1989 he was the head of the advisory and complaints office within the government, and then as an international law expert from 1989 to 1992.

[1] Ritter was a government councillor in the Markus Büchel cabinet and First Mario Frick cabinet as a member of the Patriotic Union where he was the minister of business, family, health and social services.

[1] Following the 1997 Liechtenstein general election, the Progressive Citizens' Party ended the coalition with the Patriotic Union that had existed since 1938, and as a result Ritter was appointed Deputy Prime Minister of Liechtenstein, under the government of Mario Frick.

[1] Ritter married Katja Gey (born 3 March 1970) on 3 July 1993 and they have two children together.