Philip Grindell

Philip Grindell MSc CSyP is the founder and CEO of Defuse Global, a behavioural threat management consultancy. A former Scotland Yard detective who worked in UK counterterrorism and intelligence environments, he led the specialist Parliamentary threat assessment capability established after the murder of MP Jo Cox, and trained directly under Dr Robert Fein, co-author of the U.S. Secret Service Exceptional Case Study Project.

He works with advisers, family offices and prominent individuals when someone's behaviour is causing concern but its meaning is unclear. He is one of fewer than 300 Chartered Security Professionals worldwide, is the author of Personal Threat Management: The Practitioner's Guide to Keeping Clients Safer (2025), which was shortlisted for the Business Book Awards, and is listed in Spear's 500 as Top Recommended in Security, Intelligence and Investigations.