The chief executive of BBC Studios and Post Production is set to the leave the facilities company.

Mark Thomas, who joined the wholly-owned commercial subsidiary of the BBC four years ago, will leave in April.

Thomas said: “There is never a good time to leave a job like this one, but one of the responsibilities of a chief executive is to know when it’s time to move on and let someone new take on the challenge of building on what everyone here has achieved over the last few years.”

Thomas joined what was BBC Resources to lead the transformation of the company after the sale of BBC Outside Broadcasts to SIS in 2008.

Chairman of BBC Studios and Post Production John Tate said: “Mark leaves Studios and Post Production in terrific shape for the future, having engineered a complete transformation of the business since he arrived in 2008.

“His vision and drive have ensured that valuable long-term contracts are now in place, new revenue streams have been secured, and the organisation is more agile, customer-focused and efficient.

“He leaves with our thanks for everything he has done and with our very best wishes for the future.”

A replacement chief executive is being sought.