Professor Wittmann (b. 1937) studied law at LMU Munich. He passed the first state law examination after studying for 6 ½ semesters and the second state law examination after a mandatory 3 ½ year legal internship. He then joined the Bavarian Civil Service where he worked for five years. From 1968 to his retirement he worked as an associate judge and presiding judge at the trial and appellate court of the Bavarian administrative jurisdiction. In 1995 Professor Wittmann was elected by the Bavarian Parliament as a judicial member of the Bavarian Constitutional Court.
For 20 years of his career he was also actively involved in the training and development of graduate trainees, fast-stream civil servants and administrative court judges. Furthermore, between 1996 and 2008 he was head of VWA (Verwaltung- und Wirtschaftsakademie), Munich, a college of further education that enables people to study alongside their professional commitments. After his retirement in 2002 the President of Germany appointed him for a period of five years as a member of the German national council for the judicial review of the constitutionality of laws at the Office of the Federal Chancellor.
- Member of the German national council for the judicial review of the constitutionality of laws (2006-2011)
- President of the Higher Administrative Court of Justice of Bavaria (1995-2002)
- Vice-president of the Bavarian Constitutional Court (1995-2002)
- President of the Higher Administrative Court of Bavaria (1990-1995)
- Member of the board of the Association of German Administrative Court Judges (1989-1995)