While in Boston, Steven performed and toured regularly with the Boston Symphony and Pops Orchestras, and was principal tuba of the Rhode Island and Vermont Symphonies. Steven then went on to join the OrquestaSinfonica de Galicia as principal tuba, in La Coruna, Spain. After two years in Spain, Campbell was invited to join the fellowship program with the New World Symphony in Miami Beach. After one year in Miami, Steven moved on to the New Mexico Symphony where he was principal tuba for four years. Steven moved to Minneapolis from Milwaukee where he fulfilled a one-year engagement as principal tuba with the Milwaukee Symphony.
Campbell has participated in many music festivals and chamber ensembles, including the Tanglewood Music Center, National Repertoire Orchestra, Spoleto USA, Moab Music Festival the Boston Modern Orchestra Project, and the Empire Brass Quintet.