Management Team
Frank M. Semple
Chairman, President and Chief Executive Officer
Mr. Semple joined MarkWest on
November 1, 2003. He is a member of the Board of Directors and
was elected Chairman of the Board in October 2008. Prior to joining
MarkWest he completed a 22-year career with The Williams Companies
and WilTel Communications. He served as the Chief Operating Officer
of WilTel Communications, Senior Vice President/General Manager of
Williams Natural Gas Company, Vice President of Operations and
Engineering for Northwest Pipeline Company and Division Manager for
Williams Pipeline Company. Prior to joining The Williams Companies,
Mr. Semple served in the U.S. Navy aboard the nuclear
submarine USS Gurnard (SSN 662). Mr. Semple completed the
Program for Management Development at Harvard Business School and a
holds a B.S. in Mechanical Engineering degree from the United
States Naval Academy.
C. Corwin Bromley
Senior Vice President, General Counsel and Secretary
Mr. Bromley was
appointed as General Counsel of our General Partner in September
2004. Prior to joining MarkWest, Mr. Bromley served as
Assistant General Counsel at Foundation Coal Holdings, Inc.
f/k/a RAG American Coal Holding, Inc. from 1999 through 2004,
and as General Managing Attorney and Sr. Environmental Attorney at
Cyprus Amax Minerals Company from 1989 to 1999. Prior to that,
Mr. Bromley was in private practice with the law firm Popham,
Haik, Schnobrich & Kaufman from 1984 through 1989.
Preceding his legal career, Mr. Bromley worked as a
structural/design engineer involved in several domestic and
international LNG and energy projects with the firms CBI, Inc.
and Chicago Bridge & Iron Company. Mr. Bromley
received his J.D. degree from the University of Denver and his
bachelor's degree in Civil Engineering from the University of
Wyoming.
Nancy K. Buese
Senior Vice President and Chief Financial Officer
Ms. Buese was
appointed Chief Financial Officer of our General Partner in October
2006. Prior to her appointment as Chief Financial Officer,
Ms. Buese served as Chief Accounting Officer of MarkWest since
November 2005. Prior to joining MarkWest, Ms. Buese was the
Chief Financial Officer for Experimental and Applied Sciences
("EAS") in Golden, Colorado. EAS is a wholly‑owned subsidiary of
Abbott Laboratories. Prior to her employment at EAS, Ms. Buese
was a Vice President with TransMontaigne Inc. in Denver,
Colorado. Preceding this appointment, Ms. Buese was a Partner
with Ernst & Young LLP, having spent time in the
firm's Denver, London, New York and Washington, D.C. offices.
Ms. Buese received her bachelor's degree in Accounting and
Business Administration from the University of Kansas and is a
licensed CPA in the State of Colorado.
John C. Mollenkopf
Senior Vice President and Chief Operating Officer
Mr. Mollenkopf
became the Chief Operating Officer in January 2011. Prior
to this, he served as the Chief Operations Officer of our General
Partner since October 2006. Prior to his appointment as Chief
Operations Officer, Mr. Mollenkopf served as Senior Vice
President, Southwest Business Unit, since January 2004 and as Vice
President, Business Development since January 2003. Prior to these
positions, he served as Vice President, Michigan Business Unit, of
our General Partner since its inception in May 2002 and in the same
capacity with MarkWest Hydrocarbon since December 2001. Prior to
that, Mr. Mollenkopf was General Manager of the Michigan
Business Unit of MarkWest Hydrocarbon since 1997. He joined
MarkWest Hydrocarbon in 1996 as Manager, New Projects. From 1983 to
1996, Mr. Mollenkopf worked for ARCO Oil and Gas Company,
holding various positions in process and project engineering, as
well as operations supervision. Mr. Mollenkopf received his
bachelor's degree in Mechanical Engineering from the University of
Colorado at Boulder.
Randy S. Nickerson
Senior Vice President and Chief Commercial Officer
Mr. Nickerson was
appointed as Chief Commercial Officer of our General Partner in
October 2006. Prior to his appointment as CCO, Mr. Nickerson
served as Senior Vice President, Corporate Development of MarkWest
since January 2003. Prior to these positions, Mr. Nickerson
served as Senior Vice President of our General Partner since its
inception in May 2002 and served in the same capacity with MarkWest
Hydrocarbon since December 2001. Prior to that, Mr. Nickerson
served as MarkWest Hydrocarbon's Vice President and the General
Manager of the Appalachia Business Unit since June 1997.
Mr. Nickerson joined MarkWest Hydrocarbon in July 1995 as
Manager, New Projects and served as General Manager of the Michigan
Business Unit from June 1996 until June 1997. From 1990 to 1995,
Mr. Nickerson was a Senior Project Manager and Regional
Engineering Manager for Western Gas Resources, Inc. From 1984
to 1990, Mr. Nickerson worked for Chevron USA and Meridian
Oil Inc. in various process and project engineering positions.
Mr. Nickerson received his bachelor's degree in Chemical
Engineering from Colorado State University.