Under his leadership, Kroger has positioned itself as a formidable competitor to Walmart, Amazon, and other grocery giants.

Kroger Chief Executive Rodney McMullen resigned from the company following a board investigation into his personal conduct, ending a more than four-decade career at the grocery chain.Kroger, the biggest U.

Kroger 's longtime leader Rodney McMullen abruptly resigned March 2 following a personal conduct probe initiated in February, ending a nearly 50-year career with the Cincinnati-based grocery giant. Here's what we know – and don't – about his career with the nation's largest traditional supermarket chain, and it's sudden end.