David will report to Steve Cooke, who was promoted from finance director to the role of chief executive in April.
David was previously group finance director at construction and regeneration company, Morgan Sindall. More recently, he completed a role as municipal FD at Shanks Group, and prior to this he worked at Smiths Group and trained as a chartered accountant at Ernst & Young.
Executive chairman, Roger Canham, said: “I’m pleased to announce David’s appointment as interim finance director. He has an impressive track record of working with companies undergoing change.”