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 also currently serves on the board of directors of Tendril, Inc. (a provider of energy services management solutions) and previously served on the board of Aquion Energy, Inc. (a manufacturer of proprietary Aqueous Hybrid Ion (AHI™) batteries and battery systems for long-duration, stationary energy storage applications) and the board of Cypress Envirosystems, a subsidiary of Cypress Semiconductor Corp. Mr. McDaniel graduated from the University of California 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.

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.

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 Compensation 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.

Carlin G. Conner, has served as a director and as President and Chief Executive Officer of SemGroup since 2014. Mr. Conner served as Chairman of the board of directors, President and Chief Executive Officer 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 2014 until September 2016 when SemGroup acquired all of Rose Rock. From 2012 until 2014, Mr. Conner served as managing director of Oiltanking GmbH, an independent worldwide storage provider of crude oil, refined petroleum products, liquid chemicals and gases. He served as a member of the board of directors of the general partner of Oiltanking Partners, L.P., a publicly traded master limited partnership engaged in independent terminaling, storage and transportation of crude oil, refined petroleum products and liquefied petroleum gas (“Oiltanking Partners”), from March 2011 until March 2014, and was elected Chairman in July 2011 in connection with the completion of Oiltanking Partners’ initial public offering. Mr. Conner also served as President and Chief Executive Officer of Oiltanking Partner’s general partner from 2011 to 2012 and as President and Chief Executive Officer of Oiltanking Holding Americas, Inc., a wholly owned subsidiary of Oiltanking GmbH from 2006 to 2012. Previously, from 2003 to 2006, he worked at Oiltanking GmbH’s corporate headquarters in Hamburg, Germany, where he was responsible for international business development and sat on the boards of several Oiltanking GmbH ventures. He joined Oiltanking Houston, L.P. in 2000. He began his career at GATX Terminals Corporation and served in various roles, including operations and commercial management. From April 2014 to October 2014, Mr. Conner served on the Board of Directors of the general partner of NGL Energy Partners LP, a publicly traded master limited partnership engaged in crude oil logistics, water solutions, liquids, retail propane, and refined products and renewables. He graduated from McNeese State University with a Bachelor of Science degree in environmental science.

Mr. Conner provides the Board more than 24 years of experience in the midstream industry and executive level experience gained through his services with Oiltanking GmbH and its affiliates as described above. He also has substantial board experience related to management and oversight of a midstream publicly traded master limited partnership. In addition, Mr. Conner serves as our President and Chief Executive Officer and is able to provide the Board valuable insight with respect to our management and operations. His industry knowledge, board experience and positions as President and Chief Executive Officer allow him to be a valuable contributor to the Board.