Her experience includes similar positions with British Gas/Centrica, Land Securities Group and Electronic Arts, where she was responsible for staffing matters across 16 countries. She has also worked internationally with the Walt Disney Company, B.H. Blackwell and Exxon Mobil.
Currently also a non-executive director with FirstCare and Central and Cecil Housing Trust, she retains a place on the CBI Employment and Skills Board.
Debbie White, Sodexo UK and Ireland chief executive, said: "Angela comes with great experience from a number of roles that will make her a fantastic asset to Sodexo.”
Williams added: “I am delighted to be joining Sodexo, a truly global company that has a clear vision for the future.
"I look forward to being a part of the company’s on-going development, working as part of the global HR leadership team delivering excellence for our customers and providing an engaging and motivating workplace for our employees.”