Mark was elected as West Yorkshire Police and Crime Commissioner in 2012 and re-elected with an increased majority in 2016. He is Chair of the West Yorkshire Local Criminal Justice Board (LCJB) and leads nationally for PCCs on serious violence, police aviation, ANPR and modern slavery/human trafficking portfolios, helping to establish and launch the National Anti-Slavery & Modern Slavery Network (NATMSN) in January 2016 which he chairs.
Prior to his election as PCC, Mark was a District Councillor representing the Castleford Central & Glasshoughton Ward for 15 years as part of Wakefield Council. He became a member of the West Yorkshire Police Authority in 1999 and was elected Chair of the Authority in 2003 through to 2012. 
He was also elected Chair of the National Association of Police Authorities (APA) in 2011 where he was instrumental in enabling the transition to the formation of the Association of Police and Crime Commissioners (APCC). He was honoured to receive an OBE from the Queen in 2011 for services to the community.
Mark was elected as Chair of the Association of Police and Crime Commissioners in July 2018.