Dirk-jan Mollema is a hacker and researcher of Active Directory and Azure AD at Outsider Security. Amongst the open-source tools published to advance the state of (Azure) AD research are aclpwn, krbrelayx, mitm6 and the Azure AD ROADtools framework. He blogs at dirkjanm.io, where he publishes about new Active Directory attack chains, which included the discovery of the PrivExchange vulnerability. He presented previously at TROOPERS, DEF CON, Black Hat and BlueHat and was part of the MSRC most valuable researchers 2018 to 2020 through his Azure AD research.