Berger served as Executive Officer of the Palaeo-Anthropological Scientific Trust (PAST) (now the Palaeontological Scientific Trust; PAST) from 1994 to 2001. Berger served on the committee for successful application for World Heritage Site Status for the UNESCO Sterkfontein, Swartkans, Kromdraai, and Environs site. He also served on the Makapansgat site development committee, as well as the committee for both Makapansgat and Taung's application for World Heritage site status. He was also a founding Trustee of the Jane Goodall Trust South Africa.