Mr. Gregory S. Floerke, also known as Greg, has been Chief Operating Officer of MarkWest Operations and Executive Vice President at MPLX GP LLC, General Partner of MPLX LP since October 1, 2016 and December 19, 2015 respectively. Mr. Floerke served as Chief Commercial Officer of Market Assets at MPLX GP LLC, General Partner of MPLX LP from December 19, 2015 t October 1, 2016. Mr. Floerke served as the Chief Commercial Officer and Executive Vice President at MarkWest Energy GP LLC from June 1, 2015 to December 4, 2015. Mr. Floerke served as Senior Vice President of Operations for The Northeast Region - Markwest Energy Gp Llc. Mr. Floerke has over 25 years of experience in the energy, engineering and construction industries, including over 15 years of experience serving in senior management and executive level roles. Mr. Floerke served as the Chief Operating Officer and Executive Vice President of Operations and Engineering at One Communications Corp. Mr. Floerke was responsible for leading all operations and engineering functions including, switch operations, field operations, network engineering, network planning and optimization, service delivery and the implementation of One Communications Corp's next generation network. He served as Senior Vice President of Operations at MasTec North America Inc., a subsidiary of Mastec Inc. since October 2003 and served as its Chief Operations Officer from January 3, 2005 to March 31, 2006. He is focused on working with MasTec's operating groups to achieve better productivity, profitability and cross-company synergies. His efforts initially focused on oversight of Energy, Broadband and Intelligent Traffic Systems service offerings. Mr. Floerke started his career at the Williams Companies in 1987 and worked for various Williams subsidiaries for more than 15 years. During his tenure at Williams, he worked in various engineering, project management, operations and business development positions, including Senior Vice President, Engineering and Construction for WilTel from 1998 to 2001 and Senior Vice President /General Manager of Managed Services, WilTel, from 2001 to 2002. He held various senior management positions at MasTec, Inc. from 2003 to 2006. He held various senior management positions at Williams Communications and served as Senior Vice President and General Manager for Managed Services and held various positions from 1996 to 2002. He was instrumental in the initial planning, design and building of Williams' next-generation fiber network. He served as Chief Operations Officer of Burnup & Sims Inc. since January 2005. He is employee at WilTel Communications Group Inc. He has significant business development, project management and general management experience to his new role at MarkWest. He was focused and was responsible for managing intelligent traffic services related projects for MasTec. Mr. Floerke has almost twenty years of experience in engineering, operations and business development. He served as the President of Gunther-Nash, a subsidiary of Alberci Corporation. He serves as an advisory board member for the CSM Engineering and Technology Management graduate program. He has served as a CSM strategic steering committee member and actively involved in CSM fundraising initiatives for more than 20 years. Mr. Floerke completed the Harvard Business School Program for Management Development in 2000. Mr. Floerke holds a Bachelor of Science degree in Petroleum Engineering from the Colorado School of Mines.