As a set builder, you work for a theatre or film production, creating the physical sets and backdrops for a movie or dramatic production. You accomplish your responsibilities as part of a larger production crew, creating scenes, building necessary fixtures, and ensuring that sets are movable or interchangeable as required during performances. In film and for TV shows, this mobility is less important, but still may be a requirement in closed studio settings. Other duties include setting up camera tracks, assisting the lighting crew, and maintaining accurate inventory records. You report directly to the set designer or key grip, who instructs you on current projects and needs.