Peter McGuinness Named Impossible Foods CEOImpossible Foods founder Pat Brown is stepping down as CEO, with former Chobani president and COO Peter McGuiness taking his place. Hall of Fame Profile: Peter McGuinnessPeter McGuinness, Chief Marketing & Commercial Officer at Chobani, is being inducted into the Path to Purchase Institute Hall of Fame. Here's why. Comings & Goings: November 2016 Emma Walmsley was named GSK CEO designate. She will succeed Andrew Witty as GSK CEO when he retires in March 2017.