
Isabel Thiroux
Director of Orchestra Operations
isabel.thiroux@aysymphony.org
Isabel Thiroux has been with the American Youth Symphony since she first joined the viola section in 2001. After seven years in the orchestra, she “graduated” to working in the office, becoming Orchestra Manager in 2010 and Director of Orchestra Operations in 2015.
Ms. Thiroux studied viola at CSU, Long Beach with LA Philharmonic violist John Hayhurst and maintains an active career as a freelance violist performing regularly around the Los Angeles area.

Mark Gutierrez
Community Educator & Share-A-Stand Lead Instructor
mark.gutierrez@aysymphony.org
Mark Gutierrez is a Los Angeles born upright/electric bassist, vocalist, composer, lyricist, and producer. He has been performing and creating music in the greater Los Angeles area for over ten years with a variety of ensembles, ranging in genre from Latin music, to Jazz, to Classical/Orchestral, to Hip Hop and more. An alumni of the American Youth Symphony, Mark now works with AYS’ Share-a-Stand program to bring advanced music training to students in LAUSD.

Tim Kopacz
Operations Specialist
tim.kopacz@aysymphony.org
Tim Kopacz is an artist, administrator, and producer at several Los Angeles area non-profit organizations. He is an active educator in the film and TV community, as well as a performer himself. He has degrees from both Boston College and Brown University.