Jeff Deifik, CISSP, C|CISO, MS Cybersecurity has been involved in cybersecurity and software development for several decades. He has worked at Information Sciences Institute (first e-commerce system), The Jet Propulsion Lab, and for the last 9 years at the Los Angeles Air Force Base. He is currently employed at The Aerospace Corp. He has been using Unix since 1983 and Linux since 1996.