Loren Marsteller was formerly principal trombone with the Calgary Philharmonic Orchestra in Alberta, Canada, and a euphonium soloist with "The President's Own" United States Marine Band, in Washington, D.C. Currently he is principal trombone with the California Philharmonic Orchestra, first Euphonium in the Tubadours and solo baritone with the Americus Brass Band. He holds a master's degree in trombone performance and counts as his teachers his father, Robert Marsteller, and Keith Brown.
As a free-lance artist, he has played principal trombone for the American Ballet Theatre, Dance Theatre of Harlem, Joffrey Ballet, Los Angeles Chamber Orchestra, Los Angeles Philharmonic, Utah Symphony, Vancouver Symphony and most regional orchestras in Southern California. In addition, he is greatly in demand as an orchestral specialist on euphonium, bass trumpet and tenor horn and has performed on those instruments with the Baltimore Symphony, Hong Kong Philharmonic, Long Beach Symphony, Los Angeles Philharmonic, Pacific Symphony, Pasadena Symphony, San Diego Symphony and Vancouver Symphony Orchestras.
Marsteller has recorded on A&M, Avant, Capitol, Columbia, Crystal, Golden Crest, Summit and Virgin labels, and has a reputation for finding and playing unusual brass-wind instruments such as Alphorns and Tibetan temple-horns (heard as the Vulcan horn call in Star Trek III), alto trombone, bass-flügelhorn, ophicleide and sackbuts. He is acclaimed as a soloist and clinician for both the International Trombone Association and International Tuba-Euphonium Association, and renowned as a performer and teacher throughout the United States, Canada and Mexico.