Calumet Specialty Products Partners, L.P. announced that Tim Go notified the Board of Directors of Calumet that he plans to resign as Chief Executive Officer (CEO) effective June 1, 2020 to pursue other interests closer to his family in Texas. Steve Mawer, a current board member, has been appointed to take over as CEO upon successful completion of an orderly transition process. Steve Mawer brings significant industry experience. He currently serves as Chairman of ClimeCo Corporation and on the Board of Directors of Zenith Energy Management, LLC. He also serves as a member of the advisory board of Heritage Environmental Services.