Thomas R. McDaniel , Chairman

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Thomas R. McDaniel, has served as a director of SemGroup since 2009 and as Chairman of the Board of Directors since January 1, 2017. Mr. McDaniel was Executive Vice President, Chief Financial Officer and Treasurer of Edison International, a generator and distributor of electric power and investor in infrastructure and energy assets, before retiring in 2008 after 37 years of service. Prior to 2005, he was Chairman, Chief Executive Officer and President of Edison Mission Energy, Edison International’s power generation subsidiary specializing in the development, acquisition, construction, management and operation of power production facilities. Prior to that, Mr. McDaniel served as President and Chief Executive Officer of Edison Capital, a capital and financial services business subsidiary which invests worldwide in energy and infrastructure projects. Mr. McDaniel serves on the board of directors of SunPower Corporation, a manufacturer of high-performance solar electric systems worldwide for residential, commercial and utility-scale power plant customers. He has previously served on the board of directors of Cypress Envirosystems, a subsidiary of Cypress Semiconductor Corp., Aquion Energy, Inc., a manufacturer of proprietary Aqueous Hybrid Ion (AHI™) batteries and battery systems for long-duration, stationary energy storage applications, and Tendril, Inc., a provider of energy services management solutions. Mr. McDaniel graduated from the University of California at Los Angeles with a Bachelor of Science degree.

Mr. McDaniel has extensive operational and financial management experience gained from his roles of increasing responsibility with Edison International. In addition, he provides the Board with his experience as a director and audit committee member of a public company. Mr. McDaniel’s operational and financial management experience and his understanding of the role of board of directors allow him to be a valued contributor to the Board and as Chairman.

Karl F. Kurz

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Karl F. Kurz, has served as a director of SemGroup since 2009. He currently serves on the Compensation Committee and on the Nominating and Governance Committee of the Board of Directors. From 2009 through 2012, Mr. Kurz served as a managing director of CCMP Capital Advisors, LLC, a global private equity firm. From 2000 to 2009, he was employed with Anadarko Petroleum Corporation, one of the largest independent oil and gas exploration and production companies in the world, last serving as Chief Operating Officer from December 2006. Prior to this position, he served Anadarko Petroleum Corporation in various capacities, including as Senior Vice President, North America operations, midstream and marketing, General Manager, U.S. onshore, Senior Vice President, marketing, and Vice President marketing. Prior to joining Anadarko Petroleum Corporation, Mr. Kurz previously served as general manager of midstream and marketing for Vastar Resources, Inc. and, prior to that, as manager of crude oil marketing for ARCO Oil & Gas Company. He currently serves on the boards of American Water Works Company, Inc. (the largest and most geographically diverse publicly traded U.S. water and wastewater utility company), and WPX Energy, Inc. (an oil-focused energy company with operations in the U.S. Permian, Williston and San Juan and one of the 20 largest U.S. producers based on total assets and market capitalization) and previously served on the boards of Siluria Technologies Inc., Western Gas Partners, Chaparral Energy, Inc., Global Geophysical Services, Inc. and RTS Services. Mr. Kurz graduated with a Bachelor of Science degree in petroleum engineering from Texas A&M University. He is also a graduate of Harvard University Business School’s advanced management program.

Mr. Kurz provides the Board extensive knowledge of the midstream energy services industry and executive-level leadership experience gained through his services provided to Anadarko Petroleum Corporation, Vastar Resources, Inc. and Arco Oil & Gas Company as described above. In addition, he brings public company board experience to our Board. His industry knowledge, executive-level leadership experience in relatively complex organizations and public company board experience allow Mr. Kurz to be a qualified and valuable contributor to the Board.

Ronald A. Ballschmiede

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Ronald A. Ballschmiede, has served as a director of SemGroup since 2009. He currently serves as Chairperson of the Nominating and Corporate Governance Committee of the Board of Directors and as a member of the Audit Committee of the Board of Directors. Since November 2015, Mr. Ballschmiede has served as Executive Vice President and Chief Financial Officer of Sterling Construction Company, Inc. (“Sterling”), a leading heavy civil construction company that specializes in the building and reconstruction of transportation and water infrastructure projects. Mr. Ballschmiede served as a director of the general partner of Rose Rock Midstream, L.P. (“Rose Rock”), a publicly traded master limited partnership and subsidiary of SemGroup which owned and operated a diversified portfolio of midstream energy assets, from April 2016 to September 2016 when SemGroup acquired all of Rose Rock. From 2006 to 2015, Mr. Ballschmiede served as Executive Vice President and Chief Financial Officer of Chicago Bridge & Iron Co. N.V. (“CB&I”), a leading engineering, procurement and construction company that focuses on the energy and natural resource industry. Prior to joining CB&I, he had a 29-year career in public accounting, primarily focused on serving public companies in the manufacturing and construction industry. From 2002 to 2006, Mr. Ballschmiede served as a partner with Deloitte & Touche LLP. From 1977 to 2002, he was employed by Arthur Andersen, LLP, becoming a partner in its audit division in 1989. Mr. Ballschmiede graduated from Northern Illinois University with a Bachelor of Science degree in accounting and is a certified public accountant.

Mr. Ballschmiede provides the Board with extensive accounting and financial expertise gained from his service as Executive Vice President and Chief Financial Officer of Sterling and CB&I and his prior experience as a partner of Deloitte & Touche LLP and Arthur Andersen, LLP. His experience and knowledge make him a valuable contributor of financial, accounting and risk management expertise to the Board. Mr. Ballschmiede qualifies as an “audit committee financial expert” as defined by the U.S. Securities and Exchange Commission.

James H. Lytal

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James H. Lytal, has served as a director of SemGroup since 2011. He serves on the Compensation Committee and Audit Committee of the Board of Directors. Since 2009, Mr. Lytal has served as a senior advisor to Global Infrastructure Partners, a New York based partnership that invests in infrastructure assets globally. From 1994 to 2004, Mr. Lytal was President of Leviathan Gas Pipeline Partners, which later became El Paso Energy Partners, and then Gulfterra Energy Partners, where he served on the board of directors. In 2004, Gulfterra Energy Partners merged with Enterprise Products Partners, one of the largest publicly-traded energy partnerships in the United States, where Mr. Lytal served as Executive Vice President until 2009. From 1998 to 2008, he was directly involved in the development of over $3 billion in offshore platform and oil and gas pipeline projects. Having entered the energy industry in 1980, Mr. Lytal’s business experience includes midstream mergers, acquisitions and master limited partnership drop-downs, as well as onshore midstream and deepwater asset development and management. Mr. Lytal currently serves on the boards of Rice Midstream Management LLC, the general partner of Rice Midstream Partners LP (a fee-based, growth-oriented limited partnership formed by Rice Energy Inc. (NYSE: RICE) to own, operate, develop and acquire midstream assets in the Appalachian basin) and Archrock, Inc. (a U.S. natural gas contract compression services company). He previously served as a director of Azure Midstream Partner GP, LLC, the general partner of Azure Midstream Partners LP (a fee-based, growth oriented limited partnership formed to develop, operate and acquire midstream energy assets) until May 2017. Mr. Lytal graduated from the University of Texas at Austin with a Bachelor of Science degree in petroleum engineering.

Mr. Lytal has over 37 years of experience in the midstream/MLP industry and provides the Board a broad range of knowledge and understanding in the management of midstream assets. His experience, executive leadership skills and familiarity with governance issues, particularly in the midstream sector, qualify him as a valuable and resourceful member of the Board.

Sarah M. Barpoulis

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Sarah M. Barpoulis, has served as a director of SemGroup since 2009. She currently serves as Chair of the Audit Committee of the Board of Directors and as a member of the Environmental, Health, Safety and Social Responsibility Committee of the Board of Directors. Since 2003, she has provided asset management and advisory services to the merchant energy sector through Interim Energy Solutions, LLC, a company she founded. From 1991 to February 2003, Ms. Barpoulis was employed with PG&E National Energy Group, Inc., now known as National Energy & Gas Transmission, Inc. (“National Energy”), a company that developed, built, owned and operated electric generating and natural gas pipeline facilities and provided energy trading, marketing and risk management services, last serving as Senior Vice President, commercial operations and trading. Ms. Barpoulis serves on the board of directors of South Jersey Industries, an energy services holding company with utility and non-utility operations. She is also a director of South Jersey Energy Company and Educare, DC. She previously served as a director of Reliant Energy, Inc. from 2006 to 2008. Ms. Barpoulis has a master’s degree in business administration from the Tuck School of Business at Dartmouth College and a Bachelor of Science and engineering degree from Princeton University.

Ms. Barpoulis provides the Board with valuable executive-level leadership experience and risk management and business planning expertise obtained from her consulting services provided through Interim Energy Solutions, LLC and her varied roles of increasing responsibility with National Energy. She has received a Certificate of Director Education from the NACD and qualifies as an “audit committee financial expert” as defined by the Securities and Exchange Commission. Her risk management expertise, background and prior board and work experience allow her to be a valuable contributor to the Board.

William J. McAdam

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William J. McAdam has served as a director of SemGroup since March 2017. He serves as the Chairman of the Environmental, Health, Safety and Social Responsibility Committee and as a member of the Nominating and Corporate Governance Committee of the Board of Directors. Mr. McAdam was President and Chief Executive Officer of Aux Sable Liquid Products Inc., Aux Sable Canada LP, and Aux Sable Midstream LLC (North American midstream energy companies) from 2000 to 2013. Prior to joining Aux Sable, he held progressively more senior positions with Imperial Oil and Exxon Chemical from 1974 to 1994 in the engineering, refining, fertilizer, petrochemicals, planning and natural gas liquids businesses in the United States and Canada. He began working with Aux Sable in 1995 during its development phase until 1998, and was President of Mapco Canada Energy Inc. from 1998 until 1999. Mr. McAdam joined Aux Sable in 1999 to lead the start-up and development of the Aux Sable business in conjunction with the construction and commissioning of the Alliance Pipeline/Aux Sable rich gas system in 2000. He serves as a director of Seven Generations Energy Ltd., a Canadian exploration and production company, and Tundra Energy Marketing Limited, a Canadian midstream service provider. Mr. McAdam previously served as a director of Canexus Corporation, a Canadian chemical manufacturing and handling company until it was acquired in March 2017 by ChemTrade Logistics Income Fund. He earned a Bachelor of Science in Chemical Engineering from Queen’s University and a Master of Business Administration from McMaster University. He earned the ICD.D designation from the Institute of Corporate Directors in 2015.

Mr. McAdam has over 43 years of experience in the energy industry and provides the Board a robust knowledge and understanding of the Canadian and U.S. energy sector. His executive leadership gained through his service to Aux Sable combined with his industry and public company board experience qualify him to make valuable contributions to the Board

Carlin G. Conner

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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.

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