Marsh will join from DS Smith, where he has been Group CFO for the past seven years; he is additionally a non-executive director of John Wood Group and chair of its Audit Committee.
He has previously been Group Director of Tax, Treasury and Corporate Finance of Tesco.
The company announced in January that CFO, Ruth Prior, will be leaving following the expiry of her notice period, to join Element Materials Technology.
William Hill CEO Ulrik Bengtsson said: “I am delighted to welcome Adrian to the Board.
“As a proven CFO of a FTSE-listed company with M & A, deal execution and multi-sector finance experience in US & European markets, he will be able to make a significant contribution to William Hill in the enablement of the strategy and is a great addition to the team."
Marsh said: “I am extremely excited to be joining William Hill at such a key time in the company’s history and look forward to supporting Ulrik and the rest of board in delivering their growth plans for the future."
William Hill will announce the exact date of Marsh’s appointment to the board, as well as Prior’s departure date, at a later time.
