Have an attendance code? Sign In to enter it. This live web event has ended. Thank you for attending. Contributors Stephen Harris, S.E. Stephen Harris, S.E., has practiced structural engineering for over 35 years and is a principal at Simpson Gumpertz & Heger Inc. His experience includes design of new structures, seismic strengthening of existing structures and design of pile foundation systems. His pile foundation designs include the 49ers Levi’s Stadium, Facebook’s new West Campus, Samsung’s new American Headquarters in San Jose, and the new SFO Control Tower. Other noteworthy projects include the seismic upgrade of the War Memorial Veterans Building in San Francisco, the expansion, remodel, and seismic upgrade of the J. Paul Leonard & Sutro Library at San Francisco State University, the design of the 29-story 199 Fremont office building in San Francisco and the design of forty-two new Bachelor Enlisted Quarters buildings at USMC Base, Camp Pendleton, CA.