He is the principal trumpet of the Mid-Texas Symphony. He is also principal trumpet of the San Antonio Opera and performs regularly with the San Antonio Symphony. During the summer, Andrew performs with the Cabrillo Festival Orchestra of Contemporary Music in Santa Cruz, California. Gignac has performed as a soloist with Mid-Texas Symphony, the San Antonio Symphony Pops, the Victoria Bach Festival, and the Austin Chamber Music Festival. He has been a member of the San Antonio Brass since 1989, and has served as a member of its board of directors. With the San Antonio Brass Quintet, he is very active as a chamber musician and an educator.