Team

Endurance Resources - Team

Experienced Leadership

Don Ritter

Don Ritter

Co-Founder
Chief Executive Officer

Don brings to his leadership of Endurance diverse experience in oil and gas engineering, technology, and management. Don spent the first 20 years of his career at Mobil where he served in various engineering and management roles in the United States and internationally and developed expertise in drilling engineering, completion design, and project planning.  Before co-founding the predecessor company of Endurance in 2008, Don led the engineering, business development, and sales efforts at GeoMechanics International, a technology firm focused on helping companies maximizing success in horizontal resources plays.

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Garrett Smith

Garrett Smith

Co-Founder
Chief Financial Officer

Garrett brings to his leadership of Endurance diverse financial, investment, capital markets, and transaction experience. Garrett worked for thirteen years at MESA and, following a series of corporate mergers its successor, Pioneer Natural Resources. Ultimately rising to become Executive Vice President and CFO of Pioneer, Garrett had prior roles at MESA and Pioneer, in mergers and acquisitions, business development, and corporate finance. Following Pioneer, Garrett was a general partner and portfolio manager at BP Capital and Spinnerhawk Capital, each of whom managed institutional energy investment funds, for seven years before co-founding the predecessor company to Endurance.

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Manny Sirgo

Manny Sirgo

Vice-President
Operations

Manny brings nearly 30 years of entrepreneurial operating experience across the Permian Basin to his role at Endurance. After beginning his career as a reservoir engineer at Exxon and Mid-America Petroleum, Manny was a principal at three successor companies in the Permian Basin: Sirgo Operating, MGB Energy, and CBS Operating. As a principal, Manny served in diverse roles at these companies, including business development, engineering, and operations.

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Randall Harris

Randall Harris

Vice-President
Exploration

Randall brings nearly 40 years of geological and exploration experience across the Permian Basin to his role at Endurance. He began his career as an exploration geologist for Yates petroleum before spending nearly 22 years as Exploration Manager of Ray Westall Operating.  Randall joined the Endurance Resources team when the predecessor company of Endurance acquired the assets of his former employer.