Asda, the British supermarket arm of Walmart, has said that chief financial officer Alex Russo is to leave the business and will be succeeded by Rob McWilliam, who has held the finance chief role before.
Asda, which agreed in April to be taken over by rival Sainsbury's for £7.3 billion, said Russo would depart at the end of the month after four and a half years in the job.
The supermarket said Russo had a new job but did not disclose where it was.
Prior to joining Asda, Russo spent more than 15 years in senior retail roles with Tesco, Kingfisher and Boots plc; across the UK, Europe and Asia.
At Tesco, he held a number of executive positions, including CFO of its South Korea operation between 2009 and 2011, and as commercial finance director at Tesco UK.