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Frank M. Semple was appointed as President of both our general partner and MarkWest Hydrocarbon, Inc. on November 1, 2003. Mr. Semple also became Chief Executive Officer of both MarkWest entities on January 1, 2004. Mr. Semple is a member of the Board of Directors of our general partner and was elected Chairman of the Board in October 2008. Prior to his service with MarkWest, Mr. Semple served in various capacities, most recently as Chief Operating Officer of WilTel Communications, formerly Williams Communications Group, Inc. (“WCG”) from 1997 to 2003. Prior to his tenure at WilTel Communications, he was the Senior Vice President/General Manager of Williams Natural Gas from 1995 to 1997, Vice President of Marketing and Vice President of Operations and Engineering for Northwest Pipeline, and Director of Product Movements and Division Manager for Williams Pipeline during his 22-year career with The Williams Companies. During his tenure at Williams Communications, he also served on the board of directors for PowerTel Communications and the Competitive Telecommunications Association (Comptel). Mr. Semple holds a Mechanical Engineering degree from the United States Naval Academy and is a professional engineer registered in the state of Kansas.
Donald D. Wolf was appointed Lead Director in January 2010. Mr. Wolf was elected to the Board of Directors in February 2008 and serves on the Board’s Compensation Committee. Mr. Wolf previously served as a member of the board of directors of MarkWest Hydrocarbon, Inc. from June 1999 until February 2008. In September 2004, Mr. Wolf joined Aspect Energy, LLC and currently serves as Vice Chairman. He is also Chairman and a Partner of Quantum Resources, LLC. Mr. Wolf currently serves as a Director of Aspect Energy, Enduring Resources, and Ascend Geo, LLC. Mr. Wolf previously served as Chairman, Chief Executive Officer and Director of Westport Resources Corporation from July 1996 until Westport's merger with Kerr McKee Corporation in 2004. Mr. Wolf has a diversified 45-year career in the oil and natural gas industry.
Keith E. Bailey has served as a member of the Board of Directors of our General Partner since January 2005. Mr. Bailey serves as the chairman of the Board’s Audit Committee and also serves on the Board’s Finance Committee. Mr. Bailey was formerly the Chairman, President and Chief Executive Officer of The Williams Companies, Inc. (“Williams”). Commencing in 1973, Mr. Bailey served in various capacities with Williams and its subsidiaries, including President and Chairman of Williams Pipe Line, Chairman of WilTel Communications, President of Williams Natural Gas, and Executive Vice President and Chief Financial Officer of Williams. Also, Mr. Bailey served on the Williams Board of Directors from 1988 until his retirement in 2002, including eight years as Chairman. He currently serves on the Boards of Directors of Apco Argentina Inc., Associated Electric & Gas Insurance Services Limited (AEGIS) and Integrys Energy Group, Inc. Mr. Bailey holds a bachelor’s degree in mechanical engineering from the Missouri School of Mines and Metallurgy.
Michael L. Beatty was elected to the Board of Directors of our General Partner in February 2008 and serves as the Board’s acting chairman of the Nominating and Corporate Governance Committee. Mr. Beatty previously served as a member of the board of directors of MarkWest Hydrocarbon, Inc. beginning in June 2005. Mr. Beatty is currently Chairman of the law firm of Beatty & Wozniak, P.C. headquartered in Denver, Colorado, with a practice focused exclusively on energy, including oil and gas exploration, regulatory affairs, public lands, litigation and title. A Harvard Law School graduate, Mr. Beatty began his career in the energy industry as in-house counsel for Colorado Interstate Gas Company, and ultimately became Executive Vice President, General Counsel and a Director of The Coastal Corporation. He served as Chief of Staff to Colorado Governor Roy Romer from 1993 to 1995. Mr. Beatty also currently serves on the Board of Directors of Denbury Resources Inc.
Charles K. Dempster has served as a member of the Board of Directors of our General Partner since December 2002. Mr. Dempster serves as the chairman of the Board’s Compensation Committee and also serves on the Board’s Nominating and Corporate Governance Committee. Mr. Dempster has more than 30 years of experience in the natural gas and power industry. He held various management and executive positions with Enron Corporation and its predecessors between 1969 and 1986, focusing on natural gas supply, transmission and distribution. From 1986 through 1992, Mr. Dempster served as President of Reliance Pipeline Company and Executive Vice President of Nicor Oil and Gas Corporation, oil and natural gas midstream and exploration subsidiaries of Nicor Inc. in Chicago. In 1993, he was appointed President of Aquila Energy Corporation, a wholly owned midstream, pipeline and energy trading subsidiary of Utilicorp, Inc. Mr. Dempster retired in 2000 as Chairman and Chief Executive Officer of Aquila Energy Company. Mr. Dempster holds a bachelor’s degree in civil engineering from the University of Houston and attended graduate business school at the University of Nebraska.
Donald C. Heppermann has served as a member of the Board of Directors of our General Partner since its inception in May 2002 and of the MarkWest Hydrocarbon’s Board of Directors since November 2002, and serves as chairman of the Board’s Finance Committee and serves on the Audit Committee. Mr. Heppermann served as Executive Vice President, Chief Financial Officer and Secretary of our General Partner and of MarkWest Hydrocarbon, Inc. from October 2003 until his retirement in March 2004. Mr. Heppermann joined our General Partner and MarkWest Hydrocarbon in November 2002 as Senior Vice President and Chief Financial Officer, and served as Senior Executive Vice President beginning in January 2003. Prior to joining MarkWest, Mr. Heppermann was a private investor and a career executive in the energy industry with responsibilities in operations, finance, business development and strategic planning. From 1990 to 1997, Mr. Heppermann served as President and Chief Operating Officer for InterCoast Energy Company, an unregulated subsidiary of Mid American Energy Company. From 1987 to 1990, Mr. Heppermann was employed by Pinnacle West Capital Corporation, the holding company for Arizona Public Service Company, where he was Vice President of Finance. From 1965 to 1987, Enron Corporation and its predecessors employed Mr. Heppermann in a variety of positions, including Executive Vice President, Gas Pipeline Group.
William A. Kellstrom has served as a member of the Board of Directors of our General Partner since its inception in May 2002 and of MarkWest Hydrocarbon’s Board of Directors since May 2000. Mr. Kellstrom serves on the General Partner’s Finance Committee and also serves on the Board’s Compensation Committee. Mr. Kellstrom has held a variety of managerial positions in the natural gas industry since 1968. They include distribution, pipelines and marketing. He held various management and executive positions with Enron Corporation, including Executive Vice President, Pipeline Marketing and Senior Vice President, Interstate Pipelines. In 1989, he created and was President of Tenaska Marketing Ventures, a gas marketing company for the Tenaska Power Group. From 1992 until 1997 he was with NorAm Energy Corporation (since merged with Reliant Energy, Inc.) where he was President of the Energy Marketing Company and Senior Vice President, Corporate Development. Mr. Kellstrom retired in 1997 and is periodically engaged as a consultant to energy companies.
Anne E. Mounsey was elected to the Board of Directors of our General Partner in February 2008. Ms. Mounsey previously served as a member of the Board of Directors of MarkWest Hydrocarbon, Inc. from October 2004 through February 2008. From 1991 to 2003, Ms. Mounsey held various positions with MarkWest Energy and MarkWest Hydrocarbon, her most recent as Manager of Marketing and Business Development.
William P. Nicoletti has served as a member of the Board of Directors of our general partner since its inception in May 2002. Mr. Nicoletti serves on the Board’s Audit Committee and also serves on the Board’s Nominating and Corporate Governance Committee. Mr. Nicoletti is Managing Director of Nicoletti & Company Inc., a private banking firm formed in 1991. Previously, he was a Managing Director and head of Energy Investment Banking for PaineWebber Incorporated and E.F Hutton & Company Inc. Mr. Nicoletti is a director and Chairman of the Audit Committee of Kestrel Heat LLC, the general partner of Star Gas Partners, L.P. Mr. Nicoletti is a graduate of Seton Hall University and received an MBA from Columbia University Graduate School of Business.
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