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Karen Twitchell

  • Class III Director
  • Lead Independent Director

Karen A. Twitchell has served as a member of the Board since July 2024 and previously served on the board of the General Partner from August 2022 to July 2024. In 2025, Ms. Twitchell was appointed by the Board’s independent directors to serve as the Board’s Lead Independent Director. Ms. Twitchell brings more than a dozen years of Board experience and 30 years of executive experience to the Board of Calumet. She is also on the Board of HMTX Industries.  Previously, Ms. Twitchell was chair of the board of directors of Trecora Resources (NYSE: TREC), a petrochemical and specialty wax manufacturer, until the sale of the company in June 2022. Previously, she also served on the board of directors of Kraton Corp. and KMG Chemical, both specialty chemical companies.  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 holds a Bachelor of Arts in Economics from Wellesley College and a Master of Business Administration from Harvard Business School. 

Ms. Twitchell brings extensive leadership experience in the chemicals industry, strong financial acumen as a former chief financial officer and treasurer, and extensive experience in capital markets, capital allocation oversight and financial strategy. As our Lead Independent Director, Ms. Twitchell brings to bear her significant experience on the boards of directors of public and private companies. Her background provides helpful insight to the Company in our implementation of strategic and financial initiatives and corporate governance structure and processes.