Dr. David Rentz, music director

David RentzDavid Rentz is Associate Professor of Music at Chaffey College, where he heads the choral and vocal music programs and teaches music theory. He also taught and conducted choral ensembles at the University of Wisconsin-Madison, Yale University, and, most recently, Pomona and Scripps Colleges. He is the artistic director of the Orchestra Collective of Orange County, choral director at the First Congregational Church of Riverside, co-conductor of C3LA (Contemporary Choral Collective of Los Angeles), and resident conductor of the Chamber Opera Players of Los Angeles. He also served as music director of the Orange County Symphony from 2011 to 2016. From 2005 to 2010, he lived in New York City, where he served as choral director at The Brearley School, a K-12 girls preparatory school on the Upper East Side of Manhattan, and was a principal conductor and co-founder of C4: the Choral Composer/Conductor Collective, a collectively-run ensemble devoted to performing works written in the last twenty-five years.

Dr. Rentz received his B.Mus. summa cum laude from Washington University in Saint Louis, where he was a Mylonas Scholar in the Humanities, earned his M.M at the University of Wisconsin-Madison, and received his M.M.A. and D.M.A. from the Yale University School of Music, where he was director of the University Chapel Choir and a member of the internationally-renowned Yale Schola Cantorum. He has received fellowships and grants from the Yale alumniVentures program and the National Endowment for the Humanities, and was part of the 2011 Oregon Bach Festival Master Class in Choral Orchestral Conducting. In 2015, he was named guest professor at Xiamen University (China) and recently served as lead adjudicator in the Lansum International Choir Competition.


Seung-Jai Chung, associate conductor

Seung-Jai Chung

Seung-Jai Chung is a Music Director and Conductor of the GMI Youth Orchestra and GMI Orchestra. He has been the director of GMI Orchestra since 2005, has taught violin at Grace Mission University since 2012 and has been a faculty member of Cal Music Clinic at California State University, Fullerton. Mr. Chung recently teaches violin at Fullerton College and serves as associate conductor at Orchestra Collective of Orange County since 2016. In addition to, he served as Concertmaster of the Orange County Symphony from 2009 to 2016 under the direction of David Rentz and Anthony Parnther. Mr. Chung has been featured as a soloist with the Orange County Symphony and other various orchestras.

Seung-Jai was born in Seoul, South Korea and started to play the violin at the age of seven. In his youth, he participated in numerous competitions and demonstrated his exceptional talent and skills. He received his Bachelor’s degree in Violin Performance from Dankook University in South Korea and later earned his Master’s degree in Violin Performance from California State University, Fullerton. He is currently pursuing a D.M.A in Orchestral Conducting at Claremont Graduate University.