Fields

DETROIT — Ford Motor Co. is replacing CEO Mark Fields amid questions about its current performance and future strategy, according to a person familiar with the situation.

CEO Mark Fields is retiring at age 56 after 28 years at the company, said the person who spoke on condition of anonymity because the official announcement hasn’t been made.

Fields will be replaced by Jim Hackett, who joined Ford’s board in 2013, the person said. Hackett has led Ford’s mobility unit since last year. He is the former CEO of office furniture maker Steelcase.

As CEO, Fields began Ford’s transition from a traditional automaker into a “mobility” company, laying out plans to build autonomous vehicles and explore new services such as ride-hailing and car-sharing. Under Fields, Ford achieved a record pretax profit of $10.8 billion in 2015 after the company’s new, aluminum-sided F-150 pickup went on sale.

But there were rumblings that Fields wasn’t focusing enough on Ford’s core business, as popular products like the Fusion sedan grew dated and Ford lagged behind rivals in bringing long-range electric cars to the market.