A director and dramaturg, Dimmick was resident dramaturg at the Mark Taper Forum in Los Angeles and American Conservatory Theatre in San Francisco, where she worked on both classic and contemporary plays. She directed new plays by Quincy Long for the Atlantic Theater Company, Portland Playhouse, and ASK Theatre, and by Judy Blume for the Kennedy Center in Washington, DC. She served as resident director for New Dramatists, a playwright development organization. As a production dramaturg, she worked with directors JoAnne Akalaitis, Robert Woodruff, and Garland Wright at The Guthrie Theatre, New York Theater Workshop, and Theater for a New Audience. She taught theater at Pomona College, Bard College, Dartmouth College, and Eugene Lang College, a division of New School University. She retired from Bennington College in 2016.