Mara Grey is a Celtic harper who has performed at many fairs and festivals around Puget Sound, including the Camlann Medieval Faire, Folklife Festival and the St. Patrick's Day Irish Cabaret in Everett. In 1990, she performed at the Global Forum in Rio de Janeiro with Esther "Little Dove" John, a well-known flautist.

Exploring the connection between music and healing is important to her and she play regularly at the University of Washington Medical Center, both for patients in the waiting room of the Cancer Center, in the chemotherapy room and on the oncology floor. She also performs monthly in the lobby for staff, visitors and patients.