Career
Berger began his career in indoor volleyball in 1986. At the 1999 European Championship, play at home in Vienna, Berger finished his career in indoor volleyball. In 1993, he had also begun parallel career with the beach volleyball.
With Oliver Stamm, Berger competed at the 2000 Summer Olympics, in Sydney, but they lost to the Brazilian duo Zé Marco de Melo/Ricardo Santos.
After the 2005 season the duo Berger/Doppler went their separate ways. Berger plays with Robert Nowotny until the 2008 season.