David B. Miller
Managing Partner & Founder
Prior to the establishment of EnCap, Mr. Miller served as Co-Chief Executive Officer of MAZE Exploration Inc., a Denver-based oil and gas company he co-founded in 1981. Mr. Miller began his professional career in 1973 with Republic National Bank of Dallas, ultimately serving as Vice President and Manager of the bank’s wholly-owned subsidiary, Republic Energy Finance Corporation.
Mr. Miller is a graduate of Southern Methodist University, having received Bachelor's and Master’s Degrees in Business Administration in 1972 and 1973, respectively. He has served on the Board of Trustees at Southern Methodist University since 2008 and also serves as Chairman of the Executive Board of the Edwin L. Cox School of Business. Mr. Miller is a recipient of Distinguished Alumnus Awards from both Southern Methodist University and the Cox School. In 2009, Mr. Miller was honored with the Silver Anniversary Mustang Award by the SMU Lettermen’s Association.
In 2004, Mr. Miller was appointed to the National Petroleum Council, an advisory body to the Secretary of Energy, and he is a member of the Board of Advisors of the Maguire Energy Institute. Mr. Miller was inducted into the Rocky Mountain Oil & Gas Hall of Fame and the Dallas Business Hall of Fame in 2014 and 2015, respectively.
Mr. Miller and the Miller Family Foundation support numerous charities. He is the immediate past Chairman of the Board of Goodwill Industries of Dallas and serves on the Board of Directors of the George W. Bush Foundation, the DFW Salvation Army, Methodist Health System Foundation, the UT Southwestern Medical Foundation, the Baylor Healthcare Foundation and the National Association of Basketball Coaches Foundation. He is former Board Chair and an Honorary Lifetime Director of the Senior Source of Greater Dallas. The Senior Source recognized Mr. Miller and his wife, Carolyn, with the Spirit of Generations Award in 2011. Mr. Miller was honored with the Volunteer Center’s Lifetime Achievement Award in 2013, and he received the L. Frank Pitts Energy Leadership award from the Maguire Energy Institute in 2014. In 2017, Mr. Miller was honored by the Methodist Health System Foundation with the Robert S. Folsom Leadership Award.
Gary R. Petersen
Managing Partner & Founder
Prior to the formation of EnCap in 1988, Mr. Petersen was a Senior Vice President and Manager of the Corporate Finance Division of the Energy Banking Group for Republic Bank, Houston from 1985 to 1988. His duties and responsibilities included mergers and acquisitions, financial advisory services and institutional fundraising activities for the energy industry. Prior to his position at Republic Bank, Mr. Petersen was an Executive Vice President and a member of the board of directors of Nicklos Oil & Gas Company in Houston from 1979 to 1984. Previously, Mr. Petersen was a Group Vice President in the Petroleum and Minerals Division of Republic Bank, Dallas. He served from 1970 to 1971 in the U.S. Army in Washington, D.C., as a First Lieutenant in the Finance Corps and as an Army Officer in the Army Security Agency.
Mr. Petersen holds Master of Business Administration and Bachelor of Business Administration degrees in finance from Texas Tech University and is a Distinguished Alumnus of Texas Tech. Mr. Petersen also has done post-graduate work at American University and the Stonier Graduate School of Banking at Rutgers University.
Mr. Petersen serves on the board of directors of several EnCap portfolio companies and is a member of the board of Plains All American, Inc. (NYSE: PAA) and EV Energy Partners (Nasdaq: EVEP). He is a member of the Independent Petroleum Association of America and the Houston Producers’ Forum. He is currently a member of the Memorial Hermann Healthcare System Foundation Board and Chairman of the Council on Alcohol & Drugs Foundation Board in Houston. Mr. Petersen is a minority owner and limited partner of the NFL’s Houston Texans and Major League Baseball’s Houston Astros.
D. Martin Phillips
Managing Partner & Founder
D. Martin Phillips is a Managing Partner and Co-Founder of EnCap Investments L.P. Mr. Phillips plays a leadership role in all levels of executive management including investments, fundraising, finance, accounting, compliance and personnel.
Prior to the formation of EnCap, Mr. Phillips was a Senior Vice President in the Energy Banking Group of NationsBank in Dallas.
Mr. Phillips serves on the board of directors of several EnCap portfolio companies and is a member of the Independent Petroleum Association of America, the American Petroleum Institute and the Houston Producers’ Forum. In addition, Mr. Phillips’ community involvement includes serving as the National Chairman and board member of the One Goal Foundation and also serves as a board member of the Small Steps Nurturing Center, LSU Foundation and E.J. Ourso College of Business.
Mr. Phillips holds a Master of Business Administration and a Bachelor of Science degree from Louisiana State University. He is a member of the LSU College of Business Hall of Distinction. Additionally, Mr. Phillips also attended the Stonier Graduate School of Banking at Rutgers University.
Robert L. Zorich
Managing Partner & Founder
Prior to the formation of EnCap, Mr. Zorich was a Senior Vice President in charge of the Houston office of Trust Company of the West, a large, privately held pension fund manager. Prior to that, Mr. Zorich co-founded MAZE Exploration, Inc., an oil and gas exploration and development company. During the first seven years of Mr. Zorich’s career, he was employed by Republic Bank as a Vice President and Division Manager in the Energy Department.
Mr. Zorich received his B.A. in Economics from the University of California at Santa Barbara in 1971. He also received a Master’s degree in International Management (with distinction) in 1974 from the American Graduate School of International Management in Phoenix.
Mr. Zorich serves on the board of directors of several EnCap portfolio companies. He is a member of the Independent Petroleum Association of America, the Houston Producers’ Forum and Texas Independent Producers and Royalty Owners Association. Mr. Zorich also serves on the board of several Houston charities including The Workfaith Connection, The Hope and Healing Center and is an emeritus member of Memorial Assistant Ministries.
Jason M. DeLorenzo
Prior to joining EnCap in 1999, Mr. DeLorenzo spent four years at ING Barings in New York working in Corporate Finance specializing in the energy industry. Previously, he was an Associate in the Energy Group at Wells Fargo Bank based in Houston from 1993 to 1995.
Mr. DeLorenzo received a Bachelor of Business Administration from The University of Texas at Austin.
Mr. DeLorenzo serves on the board of directors of several EnCap portfolio companies and is a member of the Independent Petroleum Association of America and the Houston Producers’ Forum.
E. Murphy Markham IV
Prior to joining EnCap in July 2006, he was the Managing Director and Group Head of JPMorgan Chase’s Oil & Gas Finance Group. Prior to the merger between JPMorgan and Bank One, Mr. Markham ran Bank One’s Oil & Gas Group. Mr. Markham started his banking career with Republic Bank in 1981 and remained with the bank and its ultimate successor, Bank of America, for 22 years, serving as a Managing Director in its Energy Banking Group.
Mr. Markham has a Bachelor of Business Administration in Finance from Texas Tech University and a Master of Business Administration in Accounting from the University of Houston. He serves on the board of directors of the Independent Petroleum Association of America, the Independent Petroleum Association of Mountain States and the Dallas Petroleum Club Wildcat Committee. Mr. Markham is an active member of the Dallas and Fort Worth Wildcatters and ADAM Energy Forum, and serves on the board of directors of several EnCap portfolio companies.
Douglas E. Swanson, Jr.
Prior to joining EnCap in 1999, Mr. Swanson spent three years as a corporate banker with Frost National Bank and Amegy Bank (formerly Southwest Bank of Texas). Mr. Swanson graduated from The University of Texas at Austin in 1994 with a Bachelor of Arts degree in Economics and also received his Master of Business Administration from University of Texas in 1999.
Mr. Swanson serves on the board of directors of several EnCap portfolio companies. In addition, he recently served on the board of the Houston Producers’ Forum and is a member of the Independent Petroleum Association of America and the Texas Independent Producers and Royalty Owners Association. Mr. Swanson also is serving active roles in several philanthropic organizations throughout the City of Houston.