He is known for his collaborations with Hans Zimmer, helping to write scores for dozens of critically acclaimed films including The Thin Red Line, The Prince of Egypt, and Gladiator.

In 1998, Oscar-winning film composer Hans Zimmer invited Badelt to work at Media Ventures in Santa Monica, California, his studio co-owned by Jay Rifkin.

While collaborating with Zimmer, Badelt contributed to the Oscar-nominated scores for The Thin Red Line and The Prince of Egypt, and wrote music for many well known directors and producers including Ridley Scott, Tony Scott, Terrence Malick, John Woo, Kathryn Bigelow, Jeffrey Katzenberg, Werner Herzog, Sean Penn, Gore Verbinski, Michael Bay and Steven Spielberg.

Badelt founded the digital film distribution startup Filmhub to create a platform for content creators to list their titles and get deals with global streaming services.

Under the leadership of Badelt and CEO Alan d'Escragnolle, Filmhub now enables thousands of filmmakers to directly distribute to more than 100 streaming channels such as IMDb TV, Tubi, Amazon Prime Video, and Plex.