Malcolm Peterson has conducted bands, choirs, and orchestras of all levels, notably the Skagit Opera and the Cascade Cantabile. He currently conducts the Mt. Baker and Fidalgo Junior Symphonies, coaches brass sections and manages the Fidalgo Youth Symphony. Mr. Peterson performs as First Trumpet with the Brass Menagerie Quintet and instructs at the Peterson Conservatory in Mt Vernon. His students have won State and National- level awards and college scholarships.

A frequent guest trumpeter in many venues, including recording studio engagements, he has soloed with the Skagit Symphony, and can be heard as first trumpet in the Starry Night Chamber Orchestra. Recently he performed as a member of the Starry Night Chamber Orchestra on trumpet and flugelhorn in the Theatre arts Guild and the META productions of "A Christmas Carol" and in Scott McDade's "Cinderella" at McIntyre Hall in Mt. Vernon. He also performed the difficult first trumpet part in Bach's B Minor Mass for the NW Community Chorale in Seattle, regularly solos with NW choral groups in Handel's Messiah, and was Music director for the Wizard of Oz (2010) and Chitty Chitty Bang Bang (2011) for Northwest Theater Arts Guild in Bellingham.