Tish worked as Chief of Governmental and Legislative Affairs for the California Department of Education before moving to the local school level.

After serving as Assistant Superintendent for San Mateo-Foster City School District for many years, Tish worked as Special Assistant to the

State Administrator for Vallejo Unified School District. She is currently Advisor to the Superintendent of the San Mateo-Foster City School District.

Tish has served on the Boards of Samaritan House, the San Mateo Public Library Foundation, St. Paul's Episcopal Church and Leadership San Mateo. In 2016, State Senator Jerry Hill surprised her with the 13th Senatorial District's Woman of the Year Award.

Tish enjoys gardening, reading, cooking, and engaging with her four young grandchildren.