Stephen White, who has been acting as interim chief executive officer, will leave YBS to take on a new role at Santander.
The society says both appointments are subject to regulatory approval.
“He has played a leading role in the development of our existing strategy, which has yielded some of our strongest financial results in our history. The process to appoint the next permanent Chief Executive Officer is well advanced and will conclude as planned later this year,” Heaps adds.
Commenting on his appointment, Lenman says: “I look forward to supporting the Society until the process for appointing a permanent chief executive officer concludes.”