As a 26-year Costa Mesa resident, Shawn Dewane was appointed to the Mesa Water District (Mesa Water®) Board of Directors in 2005, elected in 2006 and re-elected in 2010, 2014, 2018 and 2022. He currently serves as Mesa Water’s Board President.

President Dewane is Immediate Past Chairman of CalDesal, a nonprofit organization that supports clean, safe reliable drinking water for California through environmentally responsible water desalination and salinity management. He is a member of the Association of California Water Agencies and represents the District at State and National conferences. He sits on the Board of Directors for the Orange County Employees Retirement Systems (OCERS) which provides County employees secure retirement and disability benefits with the highest standards of excellence and oversight.

Professionally, he is an Investment Management Consultant with Dewane Investment Strategies, which provides tax, estate and investment planning advice to individuals and institutions. His work was profiled in a Registered Representative article titled, "Profitable Knowledge." Recognized for his achievements and service, President Dewane received the Paul Harris Fellowship from Rotary International, and a scholarship from the Los Angeles Society of Financial Analysts.

President Dewane earned a Master of Business Administration degree from Pepperdine University, and a Bachelor of Science degree from Arizona State University. He is also honored to serve as adjunct faculty at Pepperdine University.