Maryann O’Sullivan "is Founder and CEO of Preschool California and a 20-year veteran of children’s and health policy advocacy in California. She was the founding State Director for Fight Crime: Invest in Kids California and has served as a consultant to health policy advocates seeking to influence the newly democratic government of South Africa. Her areas of expertise include the California preschool landscape, teacher quality, education and economic benefits, and making the case for a “universal” preschool system in California." 
"Prior to joining Fight Crime, Ms. O’Sullivan served as the Consumer Education Officer for the California HealthCare Foundation’s Quality Initiative. She was the founding Executive Director of Health Access, a statewide consumer coalition, and served as Director of Special Health Initiatives at Children Now. She also worked as an advocate for Consumers Union, California Common Cause, and Women Against Gun Violence. Ms. O’Sullivan has served as a lecturer at San Francisco State University teaching health policy and is a member of the California Bar."