Tessie has been involved in technology adoption since 1987, where she had her first experience managing the installation of a patient information management system at a community health center in Oakland, CA. Prior to working at ZeroDivide, she served for 15 years as CEO of the Asian and Pacific Islander American Health Forum, a leading national health policy/advocacy organization with offices in San Francisco and Washington, D.C. In 2000, Tessie was appointed by former President Bill Clinton to serve as an inaugural member of the President's Advisory Commission on Asian Americans and Pacific Islanders. She currently serves as Board Chair for The California Endowment, the Board Secretary for Dignity Health and is also a board member of the Lucile Packard Foundation for Children’s Health, the Nonprofit Finance Fund, and Northern California Grantmakers (NCG). Tessie is an alumna of the University of California, Berkeley and California State University, East Bay, with a B.A. in Economics. She is a graduate of the Gallup Leadership Institute and was a 1997 Fellow of the Asian Pacific American Women's Leadership Institute.