Amazon.com Inc.’s Whole Foods Market chief has been tapped to run the retail giant’s entire grocery business. Jason Buechel will become the vice president of worldwide grocery stores, Amazon retail chief Doug Herrington said in a note to employees,

Jason Buechel will expand his role to oversee Amazon’s Worldwide Grocery Stores business, including Amazon Go convenience stores and Amazon Fresh physical and online stores, while also continuing to serve as Whole Foods Market CEO.

In his expanded role, Buechel will oversee Amazon's roster of grocers, including Whole Foods, Amazon Fresh, Amazon Go and other grocery partnerships, as the division looks for ways to boost revenue. He will keep his role as CEO of Austin-based Whole Foods.

The union win, at a Philadelphia store where workers are seeking higher wages, comes as Amazon is also fighting organizing efforts among some warehouse employees and delivery drivers.

Workers at a Whole Foods Market in Pennsylvania have voted to unionize, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain.

Subscribe today to gain access to every Research Intelligencer article we publish as well as the exclusive daily newsletter, full access to The MediaPost Cases, first-look research and daily insights from Joe Mandese, Editor in Chief. If you're already a paid subscriber, please sign-in.

The union's election win, which workers called "historic," tees up another organizing battle inside Amazon's workforce.

Jason Buechel, who will remain the head of the specialty banner, steps into a newly created role in which he will also oversee the Amazon Fresh and Amazon Go chains.

Whole Foods workers in Philadelphia became the first group to unionize under the grocery store chain. The vote came months after it filed to hold a union election in November.

SEATTLE — Amazon has tapped Whole Foods Market chief executive officer Jason Buechel to oversee its grocery business as vice president of Amazon Worldwide Grocery Stores.