Barrett Darnell was a Senior Operator at Bishop Fox and a technical lead for the Continuous Attack Surface Testing (COSMOS) Managed Security Service. Prior to coming to Bishop Fox, he served as an exploitation operator in the US Department of Defense's most elite computer network exploitation (CNE) unit. As a top-rated military officer, Barrett led an offensive operations team in the US Air Force's premier selectively-manned cyber attack squadron. Barrett also teaches SANS SEC660: Advanced Penetration Testing, Exploit Writing, and Ethical Hacking to a worldwide audience. Barrett holds a Bachelor of Science in Computer Science from Washington State University and a Master of Science in Software Engineering from the University of West Florida.