Bill Laird, chief operating officer for retail at Midcounties Co-operative, is leaving the company.
Laird, who has been at the co-operative society for seven years and pioneered the introduction of self-scan checkouts in supermarkets and convenience stores, said that although his job had been one of the most exciting and rewarding roles of his career, it was time to move on.
He said: "The merger of the former Oxford, Swindon & Gloucester Co-op with the West Midlands Society last autumn secures the future for more than 6,000 colleagues.
"However, as the new larger society moves into a period of consolidation post-merger, my job here is done and I am very much looking forward to the next great challenge for me, whatever that may be."
Bob Burlton, chief executive of Midcounties Co-operative, added: "Bill Laird has made a very distinctive and creative contribution to the society during his time here and I am sorry to see him leaving."