Lyle Raper served as production stage manager for 27 seasons at the Denver Center Theatre Company (DCTC), until 2010. She returned to DCTC to stage manage Jackie and Me and The Nest last season. Other theatres include Pacific Conservatory of the Performing Arts/Solvang Theatrefest in California, the Oregon Shakespeare Festival, Milwaukee Repertory Theater, Berkeley Repertory Theatre, Lizard Head Theatre Company, Shakespeare in Santa Fe, and the Lone Tree Arts Center where she worked on Lost Highway and The Explorers Club directed by Randal Myler. In 2000, she was one of three stage managers on the international tour of Tantalus, which performed for five months in the UK. Lyle has taught stage management classes at Denver University and Southwestern University. She currently serves on the advisory board of Georgetown Festival of the Arts in Texas.