He served as Assistant Conductor / Principal Pianist with Los Angeles Opera from 1988 to 1994, where he participated in over 40 productions and garnered a reputation as one of the country's exceptional vocal coaches.
He has served as pianist for many artists on recording and in recital, including Kiri Te Kanawa, Peter Schreier, Rod Gilfry and Audra McDonald.
In May 2000, Gershon was named Music Director of the Los Angeles Master Chorale effective Fall 2001, taking over for Paul Salamunovich who was retiring.
In 2010, Gershon led the world premiere performances of Il Postino by Daniel Catán, featuring Plácido Domingo as the poet Pablo Neruda.
In the press release, Plácido Domingo called Gershon, "an exceptional musician whose broad musical interests, technical mastery and impressive experience will be a huge asset to LA Opera".
With this expanded role, Gershon will create an "immersive" concert experience by incorporating lighting, staging, video, movement, and attire into the production.