Stephen Mawer

Executive Chairman

Stephen Mawer has served as Executive Chairman our general partner since May 2022.  Prior to that, he was Chief Executive Officer of our general partner since April 2020 and a board member of our general partner since March 2016. He retired as president of Koch Supply & Trading in 2014 following a 27-year career in commodities trading, risk management and refining operations. While at Koch, Mr. Mawer led global commodities trading and served as a senior member of the Koch Industries management team. Mr. Mawer holds Bachelor’s and Master’s degrees in chemical engineering from the University of Cambridge, England. Currently, he serves as a member of the Board of Directors at Zenith Energy Management, a midstream company, as well as chairman of ClimeCo Corporation, an environmental commodities development and management company. Mr. Mawer brings extensive knowledge of petroleum markets, refining economics, supply/marketing optimization and risk management.

Todd Borgmann

Chief Executive Officer

Todd Borgmann has served as Chief Executive Officer of our general partner since May 2022.  Prior to that, he was executive vice president - chief financial officer of our general partner since February 2021. Mr. Borgmann has fifteen years of experience with Calumet, serving the Company across a diverse set of management roles. For the five years preceding the appointment to his current position, Mr. Borgmann served as Senior Vice President - Chief Financial Officer, Senior Vice President - Interim Chief Financial Officer, Vice President of Supply & Trading, developing extensive knowledge of petroleum markets, refining operations and risk management. Mr. Borgmann has also served as Calumet’s Vice President of Business Development and Director of the Partnership’s White Oils and Petroleum sales. Mr. Borgmann earned a Bachelor of Science in Industrial Engineering from Purdue University and a Masters of Business Administration from the University of Notre Dame.

Vincent Donargo

EVP & Chief Financial Officer

Vincent Donargo joined Calumet as Chief Accounting Officer in June 2020 and was named Chief Financial Officer in May 2022.  From November 2017 to December 2019, Mr. Donargo served initially as Chief Accounting Officer for Celadon Group, Inc. before being appointed to Chief Financial Officer in May 2019. From August 2016 to November 2017, Mr. Donargo was Chief Financial Officer of Beaulieu Group LLC, a leading flooring manufacturing company throughout North America.  Prior to joining Beaulieu Group, Mr. Donargo held senior finance positions at several publicly traded companies, including Chief Financial Officer of Brightstar Corporation from April 2014 to August 2016 and Chief Financial Officer of Brightpoint, Inc. from September 2005 until it was acquired by Ingram Micro Inc. in November 2012. Mr. Donargo holds a BA in Accounting from Rutgers University.

Bruce A. Fleming

EVP Montana/Renewables and Corporate Development

Bruce A. Fleming has served as executive vice president — Montana renewables & corporate development of our general partner since February 2021. From March 2016 until the appointment to his current position, Mr. Fleming served as executive vice president - strategy & growth of our general partner. Prior to joining the Company, Mr. Fleming served as the vice president of mergers & acquisitions at Tesoro Corporation and as an officer of Tesoro Companies Inc. since 2004. From 1997 through 2004, Mr. Fleming served as managing director of Hong Kong-based Orient Refining Ltd., and from 1981 through 1996 he held senior operations, business development and planning roles with Amoco Oil and Amoco Corporation where he was most recently vice president of China business development. Mr. Fleming earned a Ph.D. in chemical engineering from Princeton University and a B.S. in chemical engineering from the University of Delaware. He is a member of the Board of M&A Standards.

Scott Obermeier

EVP Specialty Products and Solutions

Scott Obermeier was named executive vice president — commercial in January 2020. Mr. Obermeier has been a vice president with the Company since November 2017 and has more than 20 years of experience in sales and marketing as well as general management roles focused on the specialty chemicals market. Prior to his work with Calumet, he spent 10 years with Univar Solutions Inc., most recently serving as vice president where he managed the global chemical distributor’s organic chemicals business. Mr. Obermeier is a graduate of the University of Northern Iowa, with a degree in chemistry marketing.

Marc Lawn

EVP Performance Brands

Marc Lawn has served as Executive Vice President — Performance Brands since January 2021.  Before this role, Mr. Lawn served as Calumet’s Chief of Staff.  Prior to joining the Partnership, Mr. Lawn served in various senior strategy and operations roles in BP’s Lubricants business between 2010 & 2016.  Before that Mr. Lawn held senior positions in Honda Motor Company operating in the UK.  Mr. Lawn brings a broad range of experience across multiple industries, serving in multiple business function across Sales, Marketing, Operations & Supply Chain. Mr. Lawn earned a Doctorate in Business Administration from the University of Wales, an MBA from Leicester University, and an LLB (Hons) degree in Law from University College London.