Gary Johnson began his career in 1964 at NASA Johnson Space Center as a project engineering in the Power Distribution and Sequencing Section for subsystem support of the Apollo sequencer system. Following various roles and responsibilities, last being Associate Director for Technical, Safety and Mission Assurance Directorate, he retired from NASA in 2006. From March 2007 to June 2010 he was an SAIC IPAO Contract technical consultant on the Constellation Program Orion Crew Exploration Vehicle Standing Review Board for Safety, and from June 2007 to September 2012 he was an SAIC Safety & Mission Assurance Support Services Contract technical consultant for Apollo and Space Shuttle lessons learned training and Space Shuttle and International Space Station (ISS) S&MA Flight Safety Office assessments. As of October 2012, he has been an Aerospace Safety Consultant for J & P Technologies, supporting the SAIC Safety & Mission Support Engineering Services Contract to the NASA Johnson Space Center Safety & Mission Assurance Directorate, Flight Safety Office.