Went to Hollywood in 1932, to work for director
Ernst Lubitsch. He subsequently joined MGM as an assistant to
Walter Wanger, then graduated to writing and production. During World War II, he made documentaries for the Army Signals Corps. He resumed his career as producer or associate producer with MGM after 1945, including A-grade films like
Command Decision (1948) and
The Red Badge of Courage (1951). In the early 1960's, Reinhardt worked as an independent producer/director, in both Europe and in the U.S. He also directed for the stage in Salzburg, Austria.