Career
He played mostly for Turn- und Sportverein 1860 München. After coming through the youth ranks at Admira Wacker, Cerny began his professional career at German giants Football Club Bayern Munich in 1992-1993, making his top division debut on 27 October 1992, in a 1–1 draw at Eintracht Frankfurt. Just after the start of the 1993-1994 season (he appeared in three matches for the eventual champions), Cerny returned to Admira, where a good league season prompted a move to Football Club Tirol.
During 1995-1996, he returned to Munich, but with neighbours Turn- und Sportverein 1860 München.
He retired after 2006-2007, having played with the Bavarians in the second division his final three campaigns. Cerny made his debut for Austria in a March 1993 friendly match against Greece.
He earned 47 caps, scoring four goals. His last international was an April 2004 friendly match against Luxembourg.
He also played two matches at the 1998 Fédération internationale de football association World Cup in France, adding nine World Cup qualifiers.
After retiring he got the job as head coach of the U-15 of Turn- und Sportverein 1860 München and was named as replacement for Mehmet Scholl as head coach of the U-14 of Football Club Bayern Munich. Cerny is married and has two children.