Jim Dewhirst- Marketing Manager

Jim Dewhirst graduated from Oklahoma State University in 1979 with bachelors’ degrees in Marketing and Management.  He started his career with BP Exploration and held various positions including natural gas marketing and trading.  After leaving BP in 1991, Jim was employed as an Account Executive with PG&E Resources Company.  Jim was responsible for gas supply, gas and crude oil marketing and special projects.  Since joining Ensley Properties, Inc. in 1995, Jim has been involved in numerous transactions totaling more than $500MM.  Transactions have included acquisitions and divestitures of producing properties and gas gathering systems as well as marketing prospects.  Jim resides in Houston, Texas.

John T. Gray - Engineering Manager

John T. Gray graduated from Texas Tech University where he received a Bachelor of Science Degree in Chemical Engineering.  He has 21 years experience in office supervision, field operations supervision, reservoir engineering and production engineering.  John worked for major oil companies and independent oil companies as both a direct hire and a consultant involved in active exploration programs, development programs, waterflood monitoring, as well as working/nonworking interest owner operations. He has experience in primary oil and gas, secondary waterflood, tertiary CO2, horizontal drilling and remedial operations.  He has spent most of his time working the Permian Basin, but has northern Michigan and onshore Gulf Coast operational experience as well.  He has worked as an engineer or consultant for such firms as Union Oil Company of California, H. L. Brown, Jr., Penwell Energy, Inc., Chevron Corporation and David H. Arrington Oil and Gas.  He resides in Midland, Texas.

Todd A. Larsson - Operations Manager / Engineering Technician

Todd Larsson graduated from the University of Illinois – Springfield with Honors with a Bachelor of Arts Degree in Mathematical Sciences in 1995.  He began his career in the Petroleum Industry with Sipes, Williamson and Associates (now Williamson Petroleum Consultants), working as an Engineering Technician for six years.  He was responsible for constructing reservoir analysis reports, fair market value assessments, and secondary and enhanced recovery studies.  Todd joined Riviera Energy Corporation in 2007 as an Engineering Technician, became Operations Manager in 2008, and has participated in the designing, compiling, marketing and closing of numerous oil and gas Acquisitions and Divestitures since his arrival. He resides in Midland, Texas.

Rocky Valdes- Engineering Technician

Rocky Valdes graduated with a Bachelor of Science degree in 1976 and completed a Masters Degree in 2001 from Sul Ross State University.  He served the Midland Independent School District as a classroom teacher and school administrator for 14 years.  He also has 18 years of experience as a Petroleum Engineering Technician with Sipes, Williamson and Associates (now Williamson Petroleum Consultants) and T. Scott Hickman and Associates, two prominent reservoir engineering firms in Midland, Texas.  His experience with those firms included the development of annual reserves reports, reserve evaluations for acquisitions and mergers, due diligence reports, secondary recovery studies and fair market value opinions.  Valdes joined Riviera Energy Corporation in 2008 where he has participated in the publishing, marketing and closing of several oil and gas acquisitions and divestitures.  He resides in Midland, Texas.