Our Team


Philip Grindell MSc


Founder, CEO

Chosen by senior Metropolitan Police commanders to build and manage a specialist security team following the murder of Jo Cox, Philip has been one of the UK’s most trusted leaders and advisors when it comes to fixated persons and national security issues. Before being called in to serve in Parliament, Philip served as a Scotland Yard Detective for the Metropolitan Police for almost 30 years in specialist roles, including time spent seconded to British Intelligence on Counter-Terrorist investigations.

Philip was also employed as a Counter-Terrorism Security Coordinator to ensure that high profile events, including Royal and Government events, were safe from terrorist attacks with detailed contingency plans. His multi-faceted background also includes threat intelligence, risk management, protective security, and expertise in analysing and predicting the behaviour of stalkers.

Philip isn’t just a highly sought after subject matter expert in his field — he fully understands the challenges of those who live in the public spotlight and can handle the situations they face quickly, discreetly, and professionally. His ability to quickly spot patterns and trends and identify potential vulnerabilities give Defuse’s clients the peace of mind and reassurance they’re looking for, not just while a threat is being investigated, but after the problem has been solved — specifically at home, online, and out in public life.


Dr Lorraine Sheridan Phd



Dr Lorraine Sheridan is a Chartered Forensic Psychologist. She completed Europe’s first PhD on stalking. Lorraine has so far published five books and more than 80 academic research papers on a range of topics relating to stalking and other forms of threatening behaviour. Her research has taken an applied, interventionist angle and she frequently trains professionals who investigate crimes involving unwanted attention.

She is a police accredited offender profiler and compiles psychological reports related to offenders, highlighting the risks posed by known or unknown suspects. She regularly gives case management advice to the police, security personnel, celebrities and others on stalking, harassment, violence, risk assessment, threat assessment, malicious communications and similar topics.

After a long stint as an academic in universities in the UK, Lorraine is now a senior academic in Perth, Western Australia. She is current President of the Asia Pacific Association of Threat Assessment Professionals.


Dr Robert A. Fein, Ph.D.


Special Advisor

Dr Robert Fein is a forensic and national security psychologist with a specialty in threat assessment and the prevention of targeted violence. For almost forty years he has worked with law enforcement and intelligence organisations to understand and prevent targeted violence, such as assassination, workplace violence, stalking, school violence, and terrorist attacks.
From the 1980’s to the early 2000’s, Dr. Fein worked with the United States Secret Service. In his work with the Secret Service, he reviewed and consulted on several hundred protective intelligence cases concerning the assessment and management of persons who might present harm to the President and other national leaders. He co-directed two major Secret Service operational studies of targeted violence: one on assassination; the other on school attacks. In the first of these studies, the Secret Service Exceptional Case Study Project, Dr. Fein helped analyze the pre-attack behaviors and thinking of 74 persons who attacked or attempted to attack a prominent public official or figure in the U.S. from 1950 to 1996.
From 2003-2010, Dr. Fein served as a member of the U.S. Director of National Intelligence’s Intelligence Science Board. As a member of the Intelligence Science Board, from 2004 to 2009 he chaired the ISB Study on Educing Information (a study of the future of interrogation and intelligence interviewing). From 2011-2013 he was a member of the Office of the Director of National Intelligence’s Advanced Technology Board.
Dr. Fein is a consultant to the FBI’s Behavioral Analysis Unit 1 and to the FBI’s Behavioral Assessment Program. He is a member of the U.S. National Academies of Science, Engineering, and Medicine’s Intelligence Community Studies Board.
Dr. Fein is the author or co-author of more than thirty publications on assassination, school shootings, workplace violence, stalking, threat assessment, and other work on preventing targeted violent attacks



Amanda Grindell


Business Development

Amanda Grindell is our Business Development Manager at Defuse Global. With a successful career in Sales and Account Management, Amanda has worked with and supported many clients across a diverse range of industries and brings her knowledge, enthusiasm and positive attitude into the company.


Graham Hazel MVO


Protection Consultant

Graham Hazel MVO is a trusted and highly motivated, extensively trained, industry-certified, close protection professional, with 35 years service in the Metropolitan Police Service with 20 years experience in the Royalty Protection Department. Graham was awarded the MVO in the Her Majesty’s Queen’s Birthday Honours List in 2013, for services to Royalty Protection.

Graham has provided comprehensive personal security directly to senior members of the British Royal Family and other high profile visiting dignitaries. He is accustomed to compiling and reviewing all specialist risk assessments for protection operations involving the British Royal family, carrying out both foreign and domestic engagements. He has extensive experience operating domestically and globally.

Since leaving the Metropolitan Police Service, Graham continues to provide the highest standards of close protection to private clients, including consultation and management services. He is adept in all aspects of strategic planning and dynamic risk assessment including within rapidly evolving environments. His expertise enables clients to carry out their public and private engagements on an international and domestic basis and facilitates an environment where clients can live and operate with minimal disruption to both their private and professional lives. Graham’s expertise is key to providing a non-intrusive service with respect for privacy and confidentiality being paramount.

Jon Blake


Cyber Intelligence Consultant

Jon has over 28 years’ detective experience with the Metropolitan Police Service, during which he played an active part in numerous organised crime and counter terrorist operations and investigations.

He specialises in Internet and cybercrime investigation, covert investigations and risk.

He spent 3 years at the UK College of Policing as the National Coordinator for Intelligence Skills, with responsibility for Open Source and Internet Investigation and sat as a subject matter expert on several national working groups.

Jon is the co-author of the National Police Chiefs Council (NPCC) Cybercrime Investigators Manual, published in 2019.

He has provided cyber and Internet investigation training and consultancy in over 25 countries, representing organisations such as the UN, FCO and private sector firms.

Jon is a sought-after speaker, trainer and university lecturer and regularly participates in conferences in the UK and overseas.