Siew-Chin is a licensed engineer with more than 18 years of experience in design and construction. She has managed heavy highway construction projects, transportation systems, transit systems, as well as building and facilities modernization projects in both the private and public sectors. She worked for Flatiron Construction Corporation, Bay Area Rapid Transit (BART), San Francisco Public Works, and the SFMTA. Previously she served as Deputy Director of Project Delivery for the SFMTA Sustainable Streets Division (SSD). In addition to being a licensed engineer, she also holds a Master’s degree in Civil Engineering and Construction Management from Iowa State University.