William has been the Director General of the Guernsey Financial Services Commission since mid-2013. He is also a member of the Executive Committee of the International Association of Insurance Supervisors and Chairman of its Audit & Risk Committee.

Prior to joining the Commission, William was Head of Risk at the Central Bank of Ireland where he led work to renew Irish financial services supervision in the wake of the Irish banking collapse.  He also worked as the Irish participant in the small vanguard team planning operational aspects of Banking Union for the European Central Bank (ECB).  Before moving to Ireland, William worked for the UK Financial Services Authority (FSA), joining shortly before the UK financial crisis.  Whilst there, he led teams supervising a range of credit institutions, insurers and investment firms throughout the financial crisis.  Prior to becoming a financial regulator, William worked at the UK Cabinet Office where he helped write “Regulation - Less is More, a report to the Prime Minister.”  His other publications include: “Freedom for Public Services"; "The Costs of Regulation" and "PRISM Explained –Implementing Risk Based Supervision.”  Earlier in his career William gained private sector experience working for both an international oil firm on three continents and a US strategy house, Monitor Group.