Debbie White will join the group to work alongside current Interserve chief executive Adrian Ringrose, who announced plans to step down last November. She will formally take sole control of the firm on 1 September.
Interserve chairman Glyn Barker said the group had "conducted an extensive search and selection process" adding: "Debbie has considerable experience and expertise and a strong track record of success in running complex businesses in the international support services sector."
White started her career at former accounting giant Arthur Andersen before moving to Astrazeneca and PwC. In 2004 she became the chief financial officer of Sodexo's UK operations. She has progressed through the firm to be the current chief executive of government and healthcare worldwide.
“I am delighted to be joining Interserve. Over the years I have had a great respect for the company and its people and I am looking forward to leading the organisation into a new era," said White, who is also a trustee of charity Wellbeing of Women and a non-executive director of Howden Joinery.