Brad is an Angel Investor, Entrepreneur and serves as an Advisor/Director to several startup companies. He is the former CEO and co-founder of Lumedyne Technologies a MEMS Inertial Sensor company acquired by Google. While at Google, Chisum served as the Product Manager for the technology acquired from Lumedyne. Prior to Lumedyne, Chisum has held engineering and management positions at the U.S. Space and Naval Warfare Defense Systems Command (SPAWAR), and with semiconductor manufacturer STMicroelectronics.

Chisum holds four patents and three degrees: an MBA from San Diego State University, a B.S. Electrical Engineering and B.S. Mathematics from Southern Methodist University.