After retiring as the Head of Counter Terrorism for the City of London Police in 2008, Brett is today the Chief Executive of the City Security and Resilience Network (CSARN) and Director of Valentis Bridge Ltd and NHJ Strategic Consulting. His companies address the full spectrum of counter terrorism, business continuity, risk analysis and emergency planning issues featuring both nationally and internationally on defence and organisational solutions. He is the Chairman of the Defence and Security Committee in the London Chamber of Commerce and Industry, a lecturer at the Geneva Center for Security Policy, a Visiting Professor at the Marshall Centre (US Military), Germany, a Fellow of the Royal Society of Arts; a Fellow of the Security Institute; a Fellow of the Institute of Civil Protection and Emergency Management and Liveryman of the Worshipful Company of Security Professionals. Brett is also Chairman of the Crime Prevention Committee of the UK's National Business Crime Forum and a Director on it's National Board.
Brett joined the Metropolitan Police Service in 1978. Over his 30 years of service, he has been posted to uniformed, academic, strategic and detective duties. He attended Reading University and gained a Masters degree in Criminal Justice and Terrorism. As Head of Counter Terrorism, he also had national responsibility for countering hostile reconnaissance within a successful and continuing public/private partnership called 'Project Griffin'.
He is frequently asked to advise international organisations and governments including the US Congress, the US Department of State, the European Government in The Hague, the sovereign State of Georgia, has worked with the National Counter Terrorism Board in the Netherlands and briefed the Danish and Croatian Parliaments. Brett led the first international delegation into Mumbai after the attacks there in November 2008 and wrote the White Paper for the Indian Government mapping the development of more effective and joined up emergency services, security and resilience response.