Board of Directors

Board of Directors

References to “Predecessor” on this site refer to Calumet Lubricants Co., Limited Partnership and its subsidiaries, the assets and liabilities of which were contributed to Calumet Specialty Products Partners, L.P. and its subsidiaries upon the completion of our initial public offering in 2006. References on this site to “our general partner” refer to Calumet GP, LLC, the general partner of Calumet Specialty Products Partners, L.P. On July 10, 2024, Calumet Specialty Products Partners, L.P. completed a conversion of its structure from a master limited partnership to a C-Corporation following unitholder approval, pursuant to which unitholders of Calumet Specialty Products Partners, L.P. became shareholders of Calumet, Inc.

  • Stephen P. Mawer

    • Chair of the Board of Directors

    Stephen P. Mawer has served  as chair of the board of Calumet, Inc. since July 2024.  Mr. Mawer previously served as the chairman of the board of Calumet GP, LLC (the “General Partner”) from January 2023 through July 2024 and served as a board member of the General Partner from March 2016 through July 2024. From May 2022 until December 2022, Mr. Mawer served in the role of Executive Chairman of the General Partner. From April 2020 until May 2022, Mr. Mawer served as the Chief Executive Officer of the General Partner. 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 and Howard Energy Partners, both of which are midstream company, as well as chairman of ClimeCo Corporation, an environmental commodities development and management company. He previously served as a member of the advisory board of Heritage Environmental Services.

    Mr. Mawer brings extensive knowledge of petroleum markets, refining economics, supply/marketing optimization, sustainability and renewable fuels, and risk management.

  • James S. Carter

    • Class I director

    James S. Carter has served as a member of the board of directors of Calumet, Inc. since July 2024.  Mr. Carter previously served as a member of the board of the General Partner  since January 2006. Mr. Carter worked in various operations, commercial and business analysis capacities at ExxonMobil including vice president of U.S. marketing and sales of fuels and specialty products, manager of U.S. refining and marketing planning and analysis, manager of U.S. distribution activities, analysis manager of ExxonMobil International, and advisor to ExxonMobil headquarters for European refining and marketing until his retirement in 2003. Mr. Carter was previously a board member of the Association of Audit Committee Members, Inc. He received his B.S. in mechanical engineering from Clemson University and his M.B.A. in finance and accounting from Tulane University.

    Mr. Carter brings extensive managerial experience with one of the largest integrated energy companies in the world. He possesses a broad background in petroleum products marketing, with specific experience in the marketing of fuel products.

  • Daniel J. Sajkowski

    • Class II director

    Daniel J. Sajkowski has served as a member of the board of directors of Calumet, Inc. since July 2024. Mr. Sajkowski previously served as a member of the board of the General Partner since September 2014. Mr. Sajkowski has served as executive vice president, Growth and New Ventures of The Heritage Group since 2013. Prior to joining The Heritage Group, Mr. Sajkowski was the senior director — downstream technology at Sapphire Energy from 2010 until 2013. From 2004 to 2010, Mr. Sajkowski served as business unit leader at BP’s Whiting, Indiana refinery. During his career with BP/Amoco, Mr. Sajkowski also held positions as the manager of integrated supply and trading from 2002 until 2004 and vice president of refining technology from 2000 until 2002. Mr. Sajkowski earned his B.S. and M.S. degrees in chemical engineering from the University of Michigan and a Ph.D. in chemical engineering from Stanford University. He also completed The General Manager Program at Harvard University.

    Mr. Sajkowski has extensive refining industry experience including planning, operations and managerial roles for a large multinational refining company. His broad background of experience provides helpful insight to the Company in its implementation of strategic initiatives and its refinery operations in general.

  • Amy Schumacher

    • Class III director

    Amy M. Schumacher has served as a member of the board of directors of Calumet, Inc. since July 2024. Ms. Schumacher previously served as a member of the board of the General Partner since September 2014. Ms. Schumacher has been part of The Heritage Group family of businesses since 2003, working in various capacities and leading a variety of growth projects along the way. In 2008, Ms. Schumacher founded Monument Chemical and served as President and CEO for eight years. In 2016, Ms. Schumacher transitioned to President of The Heritage Group and was appointed Chief Executive Officer in 2020. From 1998 to 2003, Ms. Schumacher served as a consultant with Accenture. Ms. Schumacher received her B.S. in civil engineering from Purdue University and her M.S. in management from the Massachusetts Institute of Technology Sloan School. Ms. Schumacher currently serves as CEO and a trustee for The Heritage Group and sits on a number of private subsidiary boards. Ms. Schumacher is the daughter of Fred M. Fehsenfeld, Jr., the former chairman of the board of our general partner.

    Ms. Schumacher has extensive managerial experience including planning and strategy. She possesses a broad background within the chemicals industry, with specific experience in strategic growth projects.

  • Daniel L. Sheets

    • Class I director

    Daniel L. Sheets has served as a member of the board of directors of Calumet, Inc. since July 2024. Mr. Sheets previously served as a member of the board of the General Partner since October 2018. Mr. Sheets previously served as president of Lubrizol Additives and corporate senior vice president of The Lubrizol Corporation, a global company providing specialty chemicals for transportation, industrial and consumer markets, from 2008 until his retirement in 2018. Mr. Sheets joined Lubrizol in 1984 and served in a variety of roles including vice president of sales, vice president of engine additives, global business manager fuels, refinery and oilfield products and business development roles which led to multiple acquisitions and an assignment in Germany. Mr. Sheets received his B.S. in electrical engineering from Pennsylvania State University.

    Mr. Sheets has extensive global management experience in specialty chemicals including strategy, commercial excellence, business development and acquisitions. He possesses a broad background in petroleum products marketing, with specific experience in the marketing of lubricants, lubricant additives and specialty chemicals.

  • Paul Raymond III

    • Class III director

    Paul C. Raymond III has served as a member of the board of directors of Calumet, Inc. since July 2024. Mr. Raymond previously served as a member of the board of the General Partner since November 2020. Mr. Raymond brings over three decades of industry experience, which includes serving in his current role of chief executive officer of Monument Chemical and previously as president and chief executive officer of Sonneborn, LLC. Mr. Raymond holds a B.S. in chemical engineering from Rice University and earned his Ph.D. in chemical engineering from the University of Texas at Austin.

    Mr. Raymond brings extensive specialty chemicals knowledge and strategic insights, and his impressive track record leading and growing similar businesses makes him a terrific asset and provides helpful insight to the Partnership’s board of directors.

  • Jennifer Straumins

    • Class II director

    Jennifer G. Straumins has served as a member of the board of directors of Calumet, Inc. since July 2024. Ms. Straumins previously served as a member of the board of the General Partner since February 2021. Ms. Straumins is the Chairman of Maverick Performance Products’ Board of Directors and a Board member for Wincoram Asset Management. Prior to founding Maverick Performance Product’s, she was an employee of Calumet Specialty Products Partners for 13 years holding various positions. Prior to joining Calumet, Ms. Straumins held financial planning positions with Great Lakes Chemical Company and Exxon Chemical Company. Ms. Straumins received her B.E. in Chemical Engineering from Vanderbilt University and her MBA from the University of Kansas.

    Ms. Straumins brings extensive specialty chemicals knowledge and strategic insights. Her background provides helpful insight to the Company in its implementation of strategic initiatives and operations in general.

  • John (Jack) Boss

    • Class I director

    John (“Jack”) G. Boss has served as a member of the board of directors of Calumet, Inc. since July 2024. He previously served as a member of the board of the General Partner since August 2022. Mr. Boss brings over 40 years of experience to the Board of Calumet. He currently serves on the Board of Directors of Cooper-Standard (NYSE: CPS), Wabash National (NYSE: WNC) and Libbey, Inc. Most recently, he was the President and Chief Executive Officer of Momentive Performance Materials, a specialty chemicals and materials business from 2014 until 2020. Prior to this role, Mr. Boss served in the role of President of Honeywell Safety Products from 2012 to 2014. Mr. Boss held various managerial roles within Honeywell’s Specialty and Chemicals businesses from 2003 through 2014. Prior to Honeywell, Mr. Boss served as Vice President at Great Lakes Chemical Corporation. Mr. Boss holds a B.S. in Mechanical Engineering from West Virginia University and an MBA from Rutgers University.

    Mr. Boss brings extensive specialty chemicals and materials knowledge. In addition, he brings to the board of directors of our general partner a broad range of experiences and skills as a result of his service as a director of other public and private companies.

  • Karen Twitchell

    • Class III director

    Karen A. Twitchell has served as a member of the board of directors of Calumet, Inc. since July 2024. Ms. Twitchell previously served as a member of the board of the General Partner since August 2022. Ms. Twitchell brings more than a dozen years of Board experience and 30 years of executive experience to the Board of Calumet. Ms. Twitchell was Chair of the Board of Trecora Resources (NYSE: TREC), a petrochemical and specialty wax manufacturer, until the sale of the company in June 2022. In addition, she serves on the Board of Kraton Corp and HMTX Industries. Previously, she served on KMG Chemicals’ (NYSE: KMG) Board. From 2010 to 2013, Ms. Twitchell was Executive Vice President and Chief Financial Officer of Landmark Aviation, a private equity-backed fixed base operator for the aviation industry. Prior to 2010, Ms. Twitchell was Vice President and Treasurer of LyondellBasell Industries/Lyondell Chemical Company. Ms. Twitchell has also held senior management positions in the aluminum and cement manufacturing industries. Ms. Twitchell has a B.A. in Economics from Wellesley College and an MBA degree from Harvard Business School.

    Ms. Twitchell brings extensive leadership experience in the chemicals industry. Her background provides helpful insight to the Company in its implementation of strategic initiatives and operations in general.

  • Todd Borgmann

    • Class II director

    Todd Borgmann has served as a member of the board of directors of Calumet, Inc. since July 2024 and as President and Chief Executive Officer since May 2022.  Prior to that, he was executive vice president - chief financial officer of the General Partner since February 2021. Mr. Borgmann has over 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.

    Mr. Borgmann brings extensive knowledge of and experience in petroleum markets, refining operations and risk management.

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