Carlin G. Conner , Chief Executive Officer


Carlin G. Conner became president and chief executive officer of SemGroup in April 2014 and began driving a strategy toward focused growth and long-term value creation. Prior to joining SemGroup, Mr. Conner was managing director of Oiltanking GmbH, an independent worldwide storage provider of crude oil, refined petroleum products, liquid chemicals and gases. During his nearly 14 years with the German company, Mr. Conner focused on international business development while serving in various leadership roles at Oiltanking subsidiaries and ventures, including chairman of Oiltanking Partners, L.P. (NYSE: OILT) following its initial public offering.

As an executive board member of Marquard & Bahls, Mr. Conner was instrumental in defining a new strategy for the energy supply, trading and logistics business across Europe, the Americas, Asia and Africa. Mr. Conner began his career at GATX Terminals Corporation serving in various roles including operations and commercial management. He holds a bachelor’s degree in environmental science from McNeese State University, where he was also named 2016 Distinguished Alumnus of the Year. In addition, he completed INSEAD and MCE executive management training in France and Belgium, respectively.

Robert N. Fitzgerald , Senior Vice President and Chief Financial Officer


Robert N. Fitzgerald joined SemGroup in November 2009 and serves as senior vice president and chief financial officer. Prior to joining SemGroup, Mr. Fitzgerald served as chief financial officer from February 2008 to November 2009 of Windsor Energy Group, a private independent oil and gas exploration and development company. He has also served in senior financial and operating roles in commodity transportation and telecommunication companies. Mr. Fitzgerald was with BP Amoco and Amoco Corporation for 20 years, working in various financial and operations positions in Tulsa, Oklahoma; Houston, Texas; Denver, Colorado; and Chicago, Illinois.

Mr. Fitzgerald received a master’s degree in business administration from the University of Tulsa and a bachelor of business administration degree from Western Illinois University. He is currently a member of the American Institute of Certified Public Accountants, the Institute of Management Accountants and the Institute of Internal Auditors. He is a certified public accountant.

Timothy R. O'Sullivan , Vice President - Corporate Planning and Strategic Initiatives


Timothy R. O’Sullivan serves as vice president, corporate planning and strategic initiatives of SemGroup, a position he has held since April 2010. From February 2005 until April 2010, he served as president and chief operating officer of SemGas, L.P. From 2001 until joining our company, Mr. O’Sullivan worked for Williams Power Company where he was director of global gas and power origination. He was previously employed with Koch Industries, Inc. for 19 years where he served in various capacities in its natural gas division, including business development, marketing and trading, and executive management.

Mr. O’Sullivan began his career as a staff accountant for Main Hurdman. Mr. O’Sullivan graduated from Wichita State University with a bachelor’s degree in accounting. Mr. O’Sullivan was a member of the board of directors of the Gas Processors Association and served on its Executive and Finance Committee.

Candice L. Cheeseman , Vice President and General Counsel


Candice L. Cheeseman joined SemGroup in February 2010 and serves as vice president and general counsel. Prior to joining our company, Mrs. Cheeseman served as general counsel of Global Power Equipment Group Inc., a comprehensive provider of power generation equipment and maintenance services for energy customers, since May 2004. In September 2006, Global Power Equipment Group Inc. and its domestic subsidiaries filed voluntary petitions for relief under Chapter 11 of the U.S. Bankruptcy Code in the U.S. Bankruptcy Court for the District of Delaware. Global Power Equipment Group and its subsidiaries emerged from bankruptcy protection in January 2008. Prior to Global Power, Mrs. Cheeseman was employed by WilTel Communications Group, an internet, data, voice and video service provider, where she served in a variety of capacities, including general counsel and secretary, commencing in November 2002. Mrs. Cheeseman has been a practicing attorney for two decades serving in various capacities for Williams Communications, Marriott International and law firms in the Washington D.C. area.

Mrs. Cheeseman received her juris doctorate degree from the University of Tulsa College of Law. She also holds a bachelor of arts degree from the University of Delaware.

Thomas F. DeLorbe , Vice President - Corporate Services


Mr. DeLorbe has served as vice president – corporate services since January 2017. Mr. DeLorbe joined SemGroup in 2006, performing a business development role for the company’s asphalt business from 2006 to 2009 and serving as regional sales manager for the company’s crude oil business from 2009 to 2010. From 2010 to 2017, Mr. DeLorbe served as president of the SemMexico liquid asphalt business.

Prior to joining SemGroup, Mr. DeLorbe was employed by Koch Industries, Inc. for 20 years where he served in various roles for domestic and international businesses, including operations manager and director of compliance for Koch’s international asphalt business.

Mr. DeLorbe graduated from the University of Northern Iowa with a Bachelor of Science degree in Industrial Management.

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