Sicheritz first became known as a bass player and songwriter of the rock band Wiener Wunder, who in 1986 contributed to the soundtrack of the musical comedy blockbuster Müllers Büro and scored a #1 hit in the Austrian charts with Loretta.[4] From 1980 to 1984 Sicheritz earned his spurs as a filmmaker by working for the TV program Ohne Maulkorb with ORF. In 2009 he was among the founders of the Austrian Film Academy and served as member of the board for the first ten years.
The Sicheritz feature films Hinterholz 8 (617.596 admissions) und Poppitz (441.082) rank as #1 and #2 in the Austrian Film Institute's all time box office charts, kept since 1982.[8] His 11 feature films to date sold more than 2 million tickets in Austria.