Ed Posthumus MA MSc is co-owner and founder of Prolef (counter-espionage training) in the Netherlands and senior consultant physical security, as well as mentor of security management students (Higher professional education).

He received his master’s degree in security management from the AMU (American Military University), and went on to study at MIT (Artificial Intelligence and security) and St. Andrews (Terrorism-related study). He is also ATO and ASIS certified (cATO and CPP).

Before and during his career he worked for more than 35 years for the Dutch Justice Department and the Intelligence Services (civil and military/OF-5).