Graham joined the Metropolitan Police in 1979 and his 30-year career was predominantly in front line operational policing, serving at Tooting, Wimbledon, Fulham, Territorial Support Group and finally at New Scotland Yard in the Public Order Branch before retiring in 2010.
Graham is a Class 1 police driver and driving assessor, and was also public order trained throughout his service, experiencing his first serious disorder at Brixton in 1981 and also at Broadwater farm in 1985. He has extensive experience in policing football matches and supervising officers tasked with monitoring football risk supporters, a role that involved travelling across the UK to work with many other forces.
During his eight years at New Scotland Yard Graham managed the Public Order Protest Desk, jointly devised and wrote the national Forward Intelligence Trained officers course, and instructed on the Metropolitan Police Evidence Gatherers course. He is widely acknowledged as a subject matter expert on public order policing and protest groups in the UK.
Graham taught the pre-join Certificate of Knowledge in Policing Course to Met Police recruits from 2013 until 2020; he worked as a mentor for new police recruits on the degree entry scheme, and assessed those wishing to take promotion. He has worked as a policing commentator for many news and radio channels in the UK and internationally, and his first book – How to be a Police Officer – was published in 2017.