Cathie A. McClellan graduated from Brigham Young University in 1975 with a bachelor's degree in theatre and cinematic arts. She received her master's degree in design and technology at the University of Arizona in 1986. She returned to BYU as the costume shop manager for Design and Production.
McClellan has designed costumes for regional and festival theaters across the US, including the Utah Shakespeare Festival, the Walnut Street Theatre in Philadelphia, the Arizona Theatre Company, the Livermore Valley Opera, and Livermore Shakespeare Festival in California. She is now a member of the faculty at the University of the Pacific. She is also the Producer/Artistic Director for DeltaFusion, the summer puppet show and celebration at Victory Park.