Sean Metcalf is founder and principal security consultant of Trimarc, an information security consulting firm focused on improving enterprise security. He is one of about 100 people in the world who holds the Microsoft Certified Master Directory Services (MCM) certification, is a Microsoft MVP, and has presented on Active Directory attack and defense at BSides, Shakacon, Black Hat, DEF CON, and DerbyCon security conferences.

Sean has provided Active Directory and security expertise to government, corporate, and educational entities since Active Directory was released. He currently provides security consulting services to customers and regularly posts interesting Active Directory security information on his blog, ADSecurity.org. Follow him on Twitter @PyroTek3