He has conducted several film score soundtracks, including: As Good as It Gets, Se7en, The Manchurian Candidate, and The Village.
[5] As composer, Richman premiered his work "Behold the Bold Umbrellaphant" with the San Diego Symphony, with poetry by Jack Prelutsky.
[6] The Pittsburgh Symphony Orchestra commissioned Richman to write his "Concerto for Oboe", which premiered in October 2013.
[7] Richman composed and arranged a collection of traditional and original lullabies for children entitled: Day Is Done.
[10][11] Richman was commissioned to compose a chamber opera entitled Blood & Breath, which premiered on October 19, 2024 at the Vatican in Rome.