Partner
William R. Lemmons
Founder, EnCap Flatrock Midstream
- Firm
- EnCap Flatrock Midstream
- Title
- Founder
- Role
- Founder
- Location
- San Antonio
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Record updated 28 September 2026
About
William ("Billy") R. Lemmons, Jr. is a Founder of EnCap Flatrock Midstream. From 2002 to 2008, Mr. Lemmons served as an Executive Vice President and Senior Partner of Flatrock Energy Advisors. Prior to joining Flatrock in 2002, Mr. Lemmons served as a Vice President with Enron Corp., where he held various energy finance and commercial origination positions from 1992 to 2002. From 1984 to 1992, Mr. Lemmons was with Texas Oil & Gas Corporation, where he was a Project Development Engineer with Delhi Gas Pipeline, a Drilling and Production Engineer with TXO Production, and worked in Corporate Planning & Strategy Development.
Background
- Education
- Mr. Lemmons holds a B.S. in Petroleum Engineering from Texas A&M University, as well as an M.B.A. (Phi Kappa Phi) from the Mays Graduate School of Business at Texas A&M University. He is a Registered Professional Engineer (Inactive) in Texas, a member of the Society of Petroleum Engineers and a member of the Society of Petroleum Evaluation Engineers.Source (opens in a new tab)
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