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Darby Mullen is a seasoned professional in the field of security and software engineering, currently serving as Senior Director of Security and CSG at Ntrepid LLC since July 2012. Mullen has held various leadership positions within the company, including Director of CSG and Principal Security Architect. Prior to Ntrepid, experience includes roles as Principal Security Consultant at Echo Four, Senior Software Engineer at Abraxas Corporation, and Founder of TMI.me, a tweet elongation service. Mullen also served as Chief Operating Officer and Co-Founder of Dauntless, Inc., and worked as a Lead Software Engineer at Uninetworks, Inc. Early experience includes a role as System Administrator for the US Government and serving in the United States Marine Corps as an Infantry Section Leader. Darby Mullen holds a Bachelor of Arts in Economics from The University of Texas at San Antonio.