Dorn was born into a film industry family, her father having worked as a
set designer and film producer. Dorn attended
Hollywood High School and it was there that she decided to pursue a career as a math teacher. A job behind the scenes at a movie
sound stage led her towards working in the film industry. Dorn appeared in two films as an actress (including a nude "Archbishop" in the 1976 satire
Tunnel Vision), before moving behind the camera. She worked her way up the food chain (working as a production assistant,
script supervisor, assistant
location manager, and several other freelance jobs), before attaining the position of assistant film editor, which she held until 1982. Dorn was selected for membership in the
American Cinema Editors. ==Selected filmography==