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.

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.

The grocery chain’s store in Philadelphia becomes the first to join a union, where workers hope to expand organizing to other outlets and across the Amazon empire.