Muff first started working at UVM as the head women's tennis coach in 1987. She spent 18 years at the helm. Now she teaches tennis, squash and platform tennis in the Physical Education Department. Muff also oversees the Campus Recreation intramural tennis leagues. As the advisor for both UVM tennis and squash clubs, she gets her share of racquet sports.
In Muff's non-school time she plays squash, tennis, and platform tennis. Her hobbies include seeing live music, gardening, making crafts, and cooking up pickles and jams.