Mussy grew up in Brooklyn, New York, and recently moved with her family to Boston to start a branch of Chabad near Northeastern. Mussy studied at Excelsior College, receiving a BS in Special Education. She has taught at Hebrew schools in Commack and Westchester, New York and Roslyn, New Jersey, and has directed others in Westchester, New York and Bayside, Queens. Mussy managed an all-girls orphanage in Ukraine, where her responsibilities included mentoring and tutoring the girls, seeing to their basic living needs, and directing their social programs and outings.