what is kenneth chenault best known for 
kenneth i chenault is best known for being chief executive officer and chairman of american express from 2001 to 2018 4 he was only the third black american ceo of a fortune 500 company 5who is the ceo of american express after kenneth i chenault retired as ceo of american express in 2018 stephen squeri a former vice chairman of the company took over as ceo 4