The Grossmont Symphony Orchestra (GSO), under the musical direction of Dr. Randall Tweed, is a 75-member orchestral ensemble comprised of music- and nonmusic majors and musicians from the community. The orchestra, whose musical performance home is El Cajon's East County Performing Arts Center (ECPAC), performs a large variety of concerts from classical arts performances to lighter pops entertainment. Local and nationally reputed performing artists are frequent soloists with the GSO.
Dr. Tweed, Director of Choral/Orchestral Activities at Grossmont College, has been conducting opera, symphony, and chorus throughout Southern and Baja California since joining the music faculty in 1986. Dr. Tweed has frequently appeared as guest conductor on concert music series throughout Southern California including the United States International Orchestra, the Cabrillo Chamber Orchestra, Spreckels Organ Society, and various church music concert series. In the area of education, Dr. Tweed has appeared as adjudicator for the Music Educators National Conference, the Suzuki awards concerts, the Southern California Vocal Association, and the Music Teachers Association of California.
The Grossmont Master Chorale (GMC) under the direction of Tweed, performs throughout the greater San Diego area in a variety of musical venues in addition to being a frequent performer with the GSO.
Numbering between 50 to 60 singers, the GMC's membership includes music and nonmusic majors, dedicated community singers, and music teachers. Regular performing venues include noted concert music series such as the Organ Pavilion at San Diego's Balboa Park and Point Loma Nazarene University; notable church concert series include First Presbyterian Church of San Diego, Our Lady of Perpetual Help Catholic Church, and Santa Sophia Catholic Church.
In addition to performing a variety of classical chorale literature, the GMC performs a number of "run-out" concerts featuring choral literature from opera, operetta, musical theater, and Gilbert and Sullivan. There are also opportunities for the Chorale's membership to perform solo/ensemble literature during these "run-outs."