Fritsche became a
judge in 1981. From 1988 he worked for the CSU parliamentary group at the German
Bundestag, then based in Bonn. In 1991 he joined the Bavarian representation in Bonn. He returned to Bavaria in 1993 as chief of staff to
Hermann Regensburger and, from 1995,
Günther Beckstein, at the Bavarian State Ministry of the Interior, in the government of
Minister-President Edmund Stoiber. From October 1996 Fritsche served as Vice President of the
Federal Office for the Protection of the Constitution. In Chancellor Merkel's first term, Fritsche served as Federal Intelligence Service coordinator at the
German Chancellery from December 2005 on. In November 2009 he was appointed deputy minister () at the
Federal Ministry of the Interior under the leadership of minister
Thomas de Maizière, succeeding
August Hanning. ==Later career==