LED BY A TEAM THAT HAS SUCCESSFULLY BUILT AND MANAGED FIVE UPSTREAM BUSINESSES OVER TWO DECADES

Gene Shepherd

CEO

Gene Shepherd is a founder of ATX Energy Partners. Prior to ATX, he was a founder and Chief Executive Officer of both VTX Energy Partners, prior to its 2026 sale of its southern Delaware Basin assets to Verde Operating, and Brigham Resources, prior to its 2017 sale of its southern Delaware Basin assets to Diamondback Energy. In 2002, Gene became Chief Financial Officer of Brigham Exploration Company, and served in that role prior to its 2011 sale to Norway-based Statoil ASA.

Before joining Brigham, Gene had 20 years of financial and operational experience in the energy industry. He served as Integrated Energy Managing Director for the investment banking division of ABN AMRO Bank, where he executed merger and acquisition advisory services and capital markets transactions for energy companies. He had a similar focus in his role at Prudential Securities Incorporated, Stephens Inc., and Merrill Lynch Capital Markets. Prior to his stint in the financial services industry, Gene worked for more than four years as a petroleum engineer for Amoco Production Company and the Railroad Commission of Texas.

At the University of Texas at Austin, Gene is a member of the Executive Council of Kay Bailey Hutchison Energy Center and the Engineering Advisory Board of the Cockrell School of Engineering, where in 2017 he was awarded the school’s Distinguished Engineering Graduate Award. He has served on the board of the Permian Basin Petroleum Association, as well as on various nonprofit boards, including KIPP Austin Public Schools, the Capital Area Council of the Boy Scouts of America, and Trinity Center. Gene earned his bachelor’s degree in petroleum engineering in 1981 and his MBA in 1986, both from The University of Texas at Austin.

Erik Hoover

COO

Erik Hoover is a founder and operations leader for ATX Energy Partners. He brings a background of innovation, comprehensive operations experience, and proven, effective leadership from previous roles at multiple companies across several basins. In his career, Erik has served as an integral member of management teams pioneering advancements in drilling techniques and midstream systems that created lucrative opportunities in previously uneconomic plays and maximized overall profits and efficiency. Notably, as Operations Manager at Brigham Exploration, his involvement was crucial in developing the optimal drilling and completion formula that unlocked previously untapped economic potential in the Williston Basin. Erik continued to make successful strides in the industry as Director of Operations at Statoil ASA, following their acquisition of Brigham Exploration Company, before bringing his experience and expertise to Brigham Resources, LLC. As the Executive Vice President of Operations, Erik built Brigham Resources operations department from the ground up. He assembled a skilled team that continuously raised the bar for efficiency, cost-effectiveness, and innovation in the Southern Delaware Basin. Erik embarked on a similar journey at VTX Energy Partners where he integrated an existing team with new members to create a highly efficient operations group producing over 50,000 BOEPD before the company’s sale in August 2026.

Erik earned a bachelor’s degree in petroleum engineering from Texas A&M University.

Graham Bayley

CFO

Graham Bayley is a founder of ATX Energy Partners. Prior to ATX, he was a founder and Chief Financial Officer of VTX Energy Partners, a Vitol-backed Permian Basin exploration and production company, where he was responsible for finance, accounting and treasury, capital markets, A&D underwriting, midstream and marketing, and risk management.

Prior to VTX, Graham served in roles of increasing responsibility at the original ATX Energy Partners until taking on Chief Financial Officer responsibilities. Graham began his career as an analyst in Scotiabank's energy investment banking group.

Graham is an Advisory Council Member of the Kay Bailey Hutchison Energy Center at The University of Texas at Austin and The Muny Conservancy, a founding member of the Austin O&G Finance and Business Development Group, and an Eagle Scout. He was named the winner of the 2025 Austin Under 40 Award in Energy, Sustainability & Transportation. Graham earned a Bachelor of Business Administration in Finance and a Bachelor of Arts in Plan II Honors from The University of Texas at Austin.

Richard Winchester

EVP – Land

Richard Winchester is a founder of ATX Energy Partners, with 37 years of experience in various land and business development positions. From January 2022 through August 2026, Richard served as EVP – Land for VTX Energy Partners, LLC, with operations and business development activities focused in the Southern Delaware Basin. Richard served as EVP of Land for ATX Energy Partners, LLC from August 2017 through December 2021. Prior to joining ATX, Richard spent over 12 years at Hilcorp Energy Company in land and business development roles of increasing responsibility. The majority of Richard’s prior experience came through Devon Energy and Conoco in a variety of land and commercial roles. Richard earned his bachelor degree in Petroleum Land Management and MBA from the University of Oklahoma.

Matt Weber

EVP – Engineering

Matt Weber is a founder of ATX Energy Partners. Prior to ATX, he was a founder and Executive Vice President of Engineering of VTX Energy Partners, prior to its 2026 sale of its southern Delaware Basin assets to Verde Operating. Prior to that, he served as Reservoir Engineering Manager of Brigham Resources from 2013 until its sale of its southern Delaware Basin assets to Diamondback Energy in 2017.

Prior to joining the Brigham team in 2013, Matt served in a variety of roles at EXCO Resources from 2007 to 2013, most notably as Completions Supervisor for the Haynesville Shale team when the company was operating 22 drilling rigs and four frac crews in the play. Matt’s team was responsible for designing and optimizing completions as the Company’s gross operated Haynesville production grew from zero to over 1 BCF/D in less than three years.

Matt started his career at Anadarko Petroleum Corporation in 2004 and served as a production engineer for the Rockies coalbed methane development team and as a completions engineer for the North Louisiana HP/HT team.

Matt earned his bachelor’s degree in petroleum engineering with highest honors from The University of Texas at Austin in 2004.

Jen Harold

EVP – Production Administration

Jen Harold is a founder of ATX Energy Partners. Prior to ATX, she was a founder and the Executive Vice President of Production Administration for VTX Energy Partners, which was acquired by Verde Operating Company in 2026. Jen has 23 years of experience in production accounting and regulatory affairs, and a history of building high-performing teams and scaling successful organizations. Her experience includes positions of increasing responsibility with Brigham Resources, Brigham Exploration Company, Oasis Petroleum, and Deloitte, where she was the U.S. Manager for Petroleum Services Group.

Jen graduated from the University of Houston with a B.S. in Interdisciplinary Studies and from the University of Texas with a M.A. in Energy Resources.

Jamie Mackie

VP – Geology

Jamie Mackie is a founder at ATX Energy Partners. Prior to that, he was a founder and served as the Vice President of Geology at VTX Energy Partners from its inception through the sale of its Southern Delaware Basin position to Verde Operating in 2026.

Prior to VTX, Jamie began his career with Brigham Resources from its initial startup phase through the sale to Diamondback Energy in February of 2017. While at Brigham Resources, Jamie’s work focused on several core and reservoir characterization projects that were key to developing the Brigham Southern Delaware Basin asset.

Jamie graduated from Denison University with a BS in Geosciences and Colorado State University with an MS in Geosciences.

J Silva

J Silva is a founder of ATX Energy Partners LLC. Prior to that, he was a founder and the chief financial officer of Brigham Resources, LLC and Brigham Minerals, LLC from 2012 until the sale of substantially all of Brigham Resources’ southern Delaware Basin assets to Diamondback Energy in February 2017.

Prior to ATX and Brigham Resources, J developed significant financial experience in the energy industry through a variety of service capacities including investment banking, auditing and consulting services. Prior to joining Brigham Resources, J was a Managing Director and Chief Financial Officer for Rivington Holdings, LLC, an independent investment banking firm, where he spent over nine years providing capital raising, M&A advisory and contract CFO services to small and mid-cap energy companies. Prior to Rivington, J was an audit manager for Arthur Andersen, LLP and spent nine years in their audit energy group. J graduated from the University of Texas at Austin in 1993 with Bachelor’s and Master’s degrees in Accounting and he has his CPA license in the State of Colorado.