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.

Susan Lindberg , Vice President and General Counsel


Susan Lindberg joined SemGroup in June 2017 and serves as vice president and general counsel. Ms. Lindberg has 25 years of energy industry experience with extensive expertise in corporate governance, complex transactions, energy regulation and strategy development. Prior to SemGroup, she served as general counsel and corporate secretary for Eni US Operating Co. Inc. Ms. Lindberg joined Eni, a major integrated energy company based in Italy, in 2006.

Before Eni, Ms. Lindberg was assistant general counsel at Duke Energy Corp. Previously, she was with Enron Corp., where she joined the company as Senior Counsel for Enron Transportation Services and later became a director of government affairs. Ms. Lindberg began her career as an associate in the energy section of law firm Akin, Gump, Strauss, Hauer & Feld, LLP after earning her juris doctorate from the University of Texas School of Law.

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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