Edgar qualified as a Chartered Accountant in Sydney, Australia. Following his transfer to the London office of Coopers & Lybrand in November 1994, he joined Sterling Insurance Group in June 1997. In September 1998 he was appointed Finance Director at Sterling Insurance Company. He became Group Finance Director of Sterling Insurance Group from September 2007. Sterling Insurance was sold to Covea Insurance in February 2015, and Edgar was appointed as Finance Director of Covea Insurance in the UK from September 2015 before retiring in June 2019 to pursue other interests.

Edgar initially joined the charity in 2019 as a trustee and treasurer and has since become the CEO, after acting as interim CEO since early 2020.