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John Marrin is a seasoned professional with extensive experience in security consulting and penetration testing, currently serving as a Consultant and Penetration Tester at Coalfire since June 2021. Prior to this role, John worked as an Information Security Consultant at Denim Group from November 2020 to June 2021. John's career spans law enforcement, having served as a Police Officer with the LAPD from August 1993 to May 2018. Additionally, John contributed to the development of the first-person shooter game Critical Point: Incursion from July 2009 to February 2014, where responsibilities included creating interactive music and immersive sound design. Earlier management experience includes a role as Manager at Thrifty Drug Stores from January 1989 to August 1993. John holds a degree from California State University-San Bernardino.