NatWest managing director home buying and ownership Miguel Sard has resigned after four years at the lender.
Prior to that, Sard worked at Santander for 13 years in a number of posts, leaving as managing director for intermediaries.
NatWest says it has begun the process to find a successor.
A spokesperson for the bank says: “We can confirm that Miguel Sard is leaving to pursue opportunities outside the bank.
“A process is currently underway to appoint his replacement.
“We would like to thank him for the work he has done in building a strong customer-focused team and a resilient mortgage business that will continue to deliver sustainable returns.”
The banking veteran joined NatWest in May 2020.
Earlier this month, Sard announced that the bank had taken another step closer toward providing 48-hour remortgages.
NatWest is working with Australian homemoving hub Pexa to speed up house transactions.
At the time, Sard said: “At the heart of our strategy for growth is anticipating and meeting our customers’ needs, using data and technology to ensure we are simple to deal with.
“Pexa has already proven in Australia that remortgaging processes that ordinarily take months, can take just a couple of days, or even hours in some cases.”