Stephen Patrick Mawer is a businessperson who has been at the helm of 5 different companies. Presently, he holds the position of Chairman of Calumet Specialty Products Partners LP, Chairman at Calumet GP LLC and Chairman at ClimeCo LLC.

He is also on the board of Zenith Energy Management LLC.

Mr. Mawer previously was President at KS&T International Holdings LP and President & Director at Koch Supply & Trading Co. Ltd.

Mr. Mawer received an undergraduate degree and a graduate degree from the University of Cambridge.