A dedicated community leader, Sue began her public service career with an appointment to the Fremont Planning Commission in 2005. In 2008, she was elected to the Fremont City Council, and served two terms as Vice Mayor of Fremont—the fourth-largest city in the San Francisco Bay Area, where Asian Americans represent over 50% of the population.
At the state and national levels, Sue served as President of both the League of California Cities Asian Pacific Islander Caucus and the National League of Cities Asian Pacific American Municipal Officers Association. She co-founded the Asian Pacific Islander Leadership course at California State University, East Bay to mentor and cultivate future AANHPI leaders.