As an orchestral player, she is currently Assistant Principal with the Tacoma Symphony and has also played with the Northwest Sinfonietta, The Auburn Symphony, Seattle Studio recordings for movie and video game soundtracks, the LaCrosse Symphony Orchestra, the Central Wisconsin Symphony Orchestra and the Beloit-Janesville Symphony Orchestra. She is a member of two faculty chamber ensembles at PLU, the Camas Wind Quintet and the Lyric Brass Quintet. Some of Gillie's unique specialties that she includes in her teaching and performing are composition, natural horn, and singing.