Peck joined Gap Inc. in 2005 after former CEO Paul Pressler hired him on as Vice President of Strategy and Operations. In the mid 2000s, Peck was instrumental in steering Gap Inc.’s strategy, locally and internationally. He pitched the idea of franchising the retailer’s foreign locations, allowing local third parties to operate many of the business’ operations. He also helped launch Gap’s Product Red campaign in 2006, a campaign that also partnered with other retailers such as Converse, Apple, and Nike. He was the CEO of Gap Inc. from 2015 to 2019.