[4] Schopper began his career as Bruce Davison's understudy in an off-Broadway play called A Home Away From and later that year he was cast as the juvenile lead (Tad Springer) in the National Company touring production of the hit Broadway play, Spofford, written and directed by the legendary Broadway director, Herman Shumlin.
[6] During his career, Schopper has been involved in the production or post-production of several notable films, such as Prince of the City, Resurrection, Nine to Five, Reds, and Ishtar.
[6] For PBS he edited and directed two programs for the American Masters series, Nichols and May: Take Two, and The Lives of Lillian Hellman.
[9][10] In 2014, Schopper co-directed and edited All About Ann: Governor Richards of the Lone Star State, which was released on HBO.
[16][17] In 2020, Schopper along with Simon Ardizzone edited Kill Chain: The Cyber War on America's Elections which was nominated for Video Source Award and News and Documentary Emmy nominee (for Outstanding Investigative Documentary) in 2021.