Gregory Roosa was appointed Second Horn of the Los Angeles Philharmonic by Gustavo Dudamel in September 2012. Prior to that he held the Fourth Horn position in the St. Louis Symphony Orchestra beginning in 2003. His previous positions include Fourth Horn with the Kennedy Center Opera and Ballet Orchestra, and Fourth Horn with the Colorado Symphony in Denver.
A native of Troy, Michigan, Roosa attended the University of Illinois and studied with Ralph Froelich at the University of South Florida. In 1992, he moved to Chicago to study with Dale Clevenger, Principal Horn of the Chicago Symphony. He was a member of the Civic Orchestra of Chicago for three seasons. Active as a freelance musician in the Chicago area for eight years, Roosa played in the Broadway shows Ragtime, Phantom of the Opera, and Miss Saigon. He also played with the Chicago Symphony Orchestra, including a European tour and two recordings. Roosa has appeared as soloist and clinician at numerous universities and horn workshops around the world.
Roosa has performed with the Melbourne Symphony Orchestra and Queensland Orchestra in Australia, as well as with the Florida Orchestra and Detroit Symphony in the U.S. He was a member of the Colorado Music Festival Orchestra from 1999 to 2012, where he met his wife, Amy Jo Rhine, the Third Horn of LA Phil. Together they have two young boys, Norton and Sutton.