White is currently CEO of Government and Healthcare worldwide at the Sodexo Group.
She will join Interserve in September when existing chief Adrian Ringrose will step down.
White, who graduated with an economics degree from Cambridge, has held several senior financial roles.
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.
Under her leadership, the business diversified into probation services and expanded through several acquisitions.
Interserve chairman Glyn Barker said: “Having conducted an extensive search and selection process, I am delighted that Debbie White is joining Interserve as CEO.
“Debbie has considerable experience and expertise and a strong track record of success in running complex businesses in the international support services sector.
“I am confident that, under Debbie’s leadership, the team will deliver the change and growth necessary to take Interserve forward and enhance shareholder value.”
White said: “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.”