Managing Partner & President
Mike has thirty years of proven success in both the midstream and upstream production industries. Prior to Longhorn, Mike was a co-founder and Chairman of Discovery Midstream, which developed gas gathering, processing, and crude gathering systems in the DJ Basin. Before forming Discovery, Mike founded the Wildcat Midstream family of companies, starting with Wildcat Sabine Pipeline, a Haynesville/Bossier gathering and treating system, followed by Wildcat Caddo, a NW Louisiana cryogenic processing plant and NGL pipeline business, and Wildcat Permian, a West Texas crude pipeline company. Prior to Wildcat, his entrepreneurial ventures included Charis Partners, an East Texas/North Louisiana produced water pipeline company, Nexus Gas Partners, a North Louisiana natural gas pipeline company, and Cardinal Gas Solutions, a gas processing and treating plant leasing firm. Before starting these companies, he held business development and management positions with Regency Energy Partners, Rojo Pipeline Company, and Concorde Exploration. Mike holds a B.B.A. in Accounting from Southern Methodist University.
Chief Operating Officer
With nearly 40 years of experience in the energy industry, ranging from offshore drilling rigs to full EPC projects throughout North America, Steve has extensive experience developing, engineering, managing, and operating crude oil and natural gas assets. Most recently, as COO of STS Consulting Services, Steve oversaw the growth of the full services EPC consulting company from a staff of 6 to nearly 90 in eighteen months. Before STS, Steve was a partner and VP-Engineering/Construction at Tristate Midstream, VP - Engineering / Construction at Caiman Energy I through its sale to Williams in 2012, and was the Director of Midstream Operations at Range Resources. He began his engineering career with Western Gas Resources and was there through the transition by Anadarko Petroleum. In those roles, Steve has been successful in developing and managing capital projects ranging from $1M to $650M as well as operating systems with capacities as high as 250 MMscfd in volume. Through his career his responsibilities have ranged from detailed engineering design, installation of assets, management of as many as 1,500 employees and contractors, asset optimization, and directing operations. Beginning in 1980 Steve started in the offshore E&P sector then earned his B.S. in Chemical Engineering from Texas A&M University in 1991.
Managing Partner & CFO
Elliot has over eight years of experience in energy finance, including evaluating, financing, advising, and structuring investments in the midstream and upstream oil and gas industries. Prior to co-founding Longhorn, Elliot was the Vice President, Finance at Brazos Midstream, which acquired and developed gas gathering & processing and crude gathering systems in the Southern Delaware Basin. Before joining Brazos, Elliot was an Associate at Natural Gas Partners (NGP), where he sourced, structured, monitored and exited oil and gas investments throughout North America. Prior to joining NGP, Elliot was an Analyst at Greenhill & Co., an M&A-focused investment bank where he worked on over $10 billion in transactions related to upstream, midstream, and oilfield services businesses. Elliot received a B.B.A. in Finance and a B.A. in Economics from The University of Texas at Austin.
Longhorn Management Team
Chief Accounting Officer
Julie brings fifteen years of experience in accounting and finance to Longhorn Midstream. Prior to Longhorn, Julie was a partner and Chief Accounting Officer at Discovery Midstream. She is a licensed CPA in the state of Texas and previously served as the Controller and HR Director for Wildcat Midstream for six years. Before entering the midstream industry, Julie spent nearly ten years in retail banking. She served as Chief Financial Officer for Community Credit Union/ Viewpoint Bank where she was responsible for all finance and accounting functions for 16 retail banking branches. Previously, Julie had various accounting and managerial roles at Bank of America, Texas including Manager of Accounting Operations, AVP. Ms. Hartmann holds a B.B.A. in Finance and a B.B.A. in Marketing from Texas A&M University. She has also earned an M.B.A. in Finance from the University of Dallas.
Longhorn Midstream is a Dallas based midstream oil and gas company focused on delivering operational excellence and customer service. At Longhorn we offer innovative midstream solutions across all commodities throughout the United States.
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2651 N. Harwood St., Suite 450
Dallas, Texas 75201