BENTONVILLE, Ark. — Wal­mart’s Jet.com has named Tesco PLC veteran Simon Belsham president. Belsham will oversee all operations, including the unit’s online grocery and general merchandise business.

“With Jet Grocery being an integral part of the strategy, Simon brings incredible experience in scaling grocery delivery and his unique background in converging technology and retail to create amazing experiences for customers,” Marc Lore, Walmart’s e-commerce chief, said in a memo to ­employees.

Belsham spent seven years at Tesco, one of the United Kingdom’s largest grocery retailers. He also worked at U.K.-based Ocado, helping the online supermarket company expand its nonfood business.

Walmart earlier this month announced plans to expand its Online Grocery Delivery option to more than 100 metro areas by year’s end, when the program will be accessible to more than 40% of U.S. households.

Walmart in recent years has invested heavily in its Online Grocery Pickup service, upgrading its click-and-collect capabilities that let customers buy online, have store employees fulfill their orders and then drive to the store at their convenience to pick up their groceries. Walmart said it expects to add the service, which is currently available in over 1,200 stores, to 1,000 more stores this year.