He acted in, and directed, a variety of productions including at the Colorado Shakespeare Festival, the Oregon Shakespeare Festival, the Seattle Repertory Theatre (SRT), the Empty Space Theatre, Intiman Theatre and A Contemporary Theatre (ACT). His work gained much recognition and his obituary in The Seattle Times in 2000 commemorated his achievements: “Thanks to the influence of Mr. Loper and his colleagues, Seattle in the 1970s and 1980s by many accounts ranked among the top five theater towns in the United States. It regularly introduced plays and playwrights while giving the classics a right-now relevance.”