Mr Gregson graduated from the WA Police Academy in 1980. He rose through the ranks as a general duties officer and detective, prior to being promoted to Assistant Commissioner in 2004. He served as Portfolio head of the Metropolitan Region, Frontline Services, the Specialist Crime and the Judicial Services Portfolios.
Mr Gregson took up the position of CEO of the Fire and Emergency Services Authority in September 2011 to drive organisational and cultural reform in light of the findings of the “Report of the Perth Hills Bushfire.” He has since resigned from the WA Police to fulfill a permanent appointment as the Commissioner of the Department of Fire and Emergency Services which commenced operations on 1 November 2012.
Mr Gregson is a graduate of the FBI National Academy and holds a Bachelors degree in Politics and Philosophy and a Masters degree in Business Administration. He is a Graduate of the Australian Institute of Company Directors and an Executive Fellow of the Australia and New Zealand School of Government. He was awarded the Australian Police Medal in 2006. He has a diverse range of hobbies, which include music and gardening.