Andy is an active red teamer and co-author of BloodHound, a tool designed to reveal the hidden and unintended permission relationships in Active Directory domains. He has performed numerous red team operations and penetration tests against banks, credit unions, health-care providers, defense companies, and other Fortune 500 companies across the world. He has presented at DEF CON, BSides Las Vegas, DerbyCon, ekoparty, and actively researches Active Directory security. He is also a veteran Black Hat trainer.