In addition to teaching at OCSA, Warren Gref currently serves as an adjunct professor at Cal State Fullerton where he teaches Horn. He also teaches Horn a UC San Diego, and is a horn coach at Vista Murrieta High School, Rancho Buena Vista High School, Carslbad High School, and many others. Mr. Gref studied at USC and the Cleveland Institute of Music. His pricipal teachers were Wendell Hoss, James Decker and Myron Bloom.
As an orchestral musician, Mr. Gref has performed under such internationally acclaimed conductors and composers as Leonard Bernstein, Aaron Copland, EsaPekka Salonen, John Williams, Zubin Mehta, James Levine, Simon Rattle, Pierre Boulez, Jeffrey Tate, and Antal Dorati. He has also performed for Broadway musicals including Phantom of the Opera, Wicked, Titanic, Beauty and the Beast, Showboat, Ragtime, The Producers, and others. He has also done a considerable amount of freelance work for Los Angeles-based television and motion picture studios (Paramount, Warner Brothers, Sony, Capitol, Fox), and has a contract with the San Diego Symphony for many years.