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Our Company

Board of Directors

J. Michael Yeager

Non-Executive Chairman

Michael Yeager as Chairman, joined the Company as Chief Executive Officer and Executive Chairman in October 2013 with the objective of building an oil and gas company beyond Maverick’s initial assets. With over 37 years of executive level experience in the oil and gas business, Mr. Yeager has a strong international petroleum background and a deep development and operating understanding.

Mr. Yeager was the CEO of BHP Billiton Petroleum from 2006 – 2013. Previously he was at ExxonMobil, where he held various global executive roles, including Vice President of ExxonMobil Development Company, and Vice President – Africa, and Vice President – Europe for ExxonMobil Production Company. He held the position of CEO for the ExxonMobil Canadian affiliate, Imperial Oil Resources, where he was responsible for all aspects of their upstream oil and gas business. While at Mobil Corporation, he was President of Mobil Exploration and Producing, U.S. and performed key roles in the merger with Exxon.

Mr. Yeager holds a Bachelor of Science degree from the U.S. Naval Academy and a Master of Science degree from the University of Southern California.

J. Russell Porter

Executive Director

Russell Porter as Executive Director, joined the Company as President and Chief Executive Officer in January 2019. With over 25 years of executive level experience in the oil and gas business, Mr. Porter has a strong oil and natural gas marketing, property acquisition and shale business development.

Mr. Porter’s experience has primarily been leading publically traded upstream companies operating in the U.S. enhanced by previous work in the energy banking industry. Mr. Porter was Chief Operating Officer and subsequently President and CEO of Gastar Exploration Inc. While at Forcenergy, Inc. he served as Executive Vice President and various other leadership roles.

Mr. Porter holds a Bachelor of Science degree in Petroleum Land Management from Louisiana State University and an MBA from the University of North Carolina at Chapel Hill.

Lee Anthony Clarke

Vice Chairman - Independent Non-executive Director

Mr. Clarke is the principal and director of a private financial advisory and wealth management firm. He has over twenty years of financial planning and wealth management experience, advising a select group of successful families and private investors. During his career, he has been involved in capital raisings and initial public offerings and brings strategic knowledge of the Australian investor market. He is a Certified Financial Planner and a principal member of the Financial Planning Association.

David A. Casey

Independent Non-executive Director

Mr. Casey graduated with an Honors degree in Geology from the University of Sydney in 1991 and in the same year joined specialist coal seam gas (coalbed methane) company in Situ (Australia)) Pty Ltd. In 1996, he formed his own unconventional energy consultancy business. David has over 20 years of experience in the management and evaluation of all aspects of unconventional oil and gas exploration and appraisal, from initial reservoir characterization and fairway identification through to drilling, testing and operations. David was executive director and chief operating officer at Molopo Energy from 2001 and 2005 where he worked closely with Stephen Mitchell in developing a very successful unconventional energy company with assets in Australia, The US, Canada, China and South Africa. Mr. Casey’s most recent executive roles were as Managing Director of Petrel Energy, Ltd., which recently merged with Warrego Energy Ltd., and Managing Director of Eastern Star Gas Limited, which he and his team grew from modest beginnings to the subject of a $924m takeover by Santos Limited valuing the Narrabri Project at $1.42b.

Nigel H. Smith

Independent Non-executive Director

Mr. Smith has over 35 years of experience in the oil and gas industry with senior management roles in engineering, project management, drilling operations and acquisitions. After a long career with Shell, ARCO (Atlantic Richfield Company) and BHP Billiton Petroleum, he has held numerous global executive roles, and he also has extensive experience in the U.S. onshore horizontal drilling and fracing operations. Mr. Smith holds a BSc Hons degree from Nottingham University, England.

Winston M. Talbert

Independent Non-executive Director

Mr. Talbert has over 22 years of experience as a senior executive in the U.S. oil and gas industry, primarily at large and successful publicly-traded exploration and production companies.  Most recently, Mr. Talbert served as EVP and Chief Financial Officer of Sable Permian Resources and was formerly the CFO of Plains Exploration & Production until it was sold to Freeport-McMoRan, at which time he became the CFO of its affiliated partnership, Freeport-McMoRan Oil & Gas LLC.  Mr. Talbert has significant merger and acquisition experience, and he successfully arranged the financing of over $14 billion in acquisitions over a series of major transactions.  His knowledge of the capital markets and creative deal structures have allowed for the successful integration of the acquisitions.  Mr. Talbert has a B.B.A. from Southern Methodist University and an M.B.A. from Emory University.  Mr. Talbert will be based in Houston, Texas.

Heath A. Sumrow

Independent Non-executive Director

Mr. Sumrow is a Partner with Ramas Capital Management, and oil and gas focused investment firm based in Houston, Texas. He serves on the firm’s Investment Committee, which oversees all of the firm’s activities with regard to new investment opportunities, including identification, evaluation and execution In addition, Mr. Sumrow is charged with the active management of the firm’s portfolio companies, including, but not limited to, the oversight of all technical and operational matters. He has over 16 years of oil and gas industry and investment experience with a proven track record of value creation at both public and private exploration and production companies. Mr. Sumrow holds a B.S. in Petroleum Engineering from Texas Tech University and an M.B.A. from the University of Florida.

Board of Directors

J. Michael Yeager

Non-Executive Chairman

Michael Yeager as Chairman, joined the Company as Chief Executive Officer and Executive Chairman in October 2013 with the objective of building an oil and gas company beyond Maverick’s initial assets. With over 37 years of executive level experience in the oil and gas business, Mr. Yeager has a strong international petroleum background and a deep development and operating understanding.

Mr. Yeager was the CEO of BHP Billiton Petroleum from 2006 – 2013. Previously he was at ExxonMobil, where he held various global executive roles, including Vice President of ExxonMobil Development Company, and Vice President – Africa, and Vice President – Europe for ExxonMobil Production Company. He held the position of CEO for the ExxonMobil Canadian affiliate, Imperial Oil Resources, where he was responsible for all aspects of their upstream oil and gas business. While at Mobil Corporation, he was President of Mobil Exploration and Producing, U.S. and performed key roles in the merger with Exxon.

Mr. Yeager holds a Bachelor of Science degree from the U.S. Naval Academy and a Master of Science degree from the University of Southern California.

J. Russell Porter

Executive Director

Russell Porter as Executive Director, joined the Company as President and Chief Executive Officer in January 2019. With over 25 years of executive level experience in the oil and gas business, Mr. Porter has a strong oil and natural gas marketing, property acquisition and shale business development.

Mr. Porter’s experience has primarily been leading publically traded upstream companies operating in the U.S. enhanced by previous work in the energy banking industry. Mr. Porter was Chief Operating Officer and subsequently President and CEO of Gastar Exploration Inc. While at Forcenergy, Inc. he served as Executive Vice President and various other leadership roles.

Mr. Porter holds a Bachelor of Science degree in Petroleum Land Management from Louisiana State University and an MBA from the University of North Carolina at Chapel Hill.

Lee Anthony Clarke

Vice Chairman - Independent Non-executive Director

Mr. Clarke is the principal and director of a private financial advisory and wealth management firm. He has over twenty years of financial planning and wealth management experience, advising a select group of successful families and private investors. During his career, he has been involved in capital raisings and initial public offerings and brings strategic knowledge of the Australian investor market. He is a Certified Financial Planner and a principal member of the Financial Planning Association.

David A. Casey

Independent Non-executive Director

Mr. Casey graduated with an Honors degree in Geology from the University of Sydney in 1991 and in the same year joined specialist coal seam gas (coalbed methane) company in Situ (Australia)) Pty Ltd. In 1996, he formed his own unconventional energy consultancy business. David has over 20 years of experience in the management and evaluation of all aspects of unconventional oil and gas exploration and appraisal, from initial reservoir characterization and fairway identification through to drilling, testing and operations. David was executive director and chief operating officer at Molopo Energy from 2001 and 2005 where he worked closely with Stephen Mitchell in developing a very successful unconventional energy company with assets in Australia, The US, Canada, China and South Africa. Mr. Casey’s most recent executive roles were as Managing Director of Petrel Energy, Ltd., which recently merged with Warrego Energy Ltd., and Managing Director of Eastern Star Gas Limited, which he and his team grew from modest beginnings to the subject of a $924m takeover by Santos Limited valuing the Narrabri Project at $1.42b.

Nigel H. Smith

Independent Non-executive Director

Mr. Smith has over 35 years of experience in the oil and gas industry with senior management roles in engineering, project management, drilling operations and acquisitions. After a long career with Shell, ARCO (Atlantic Richfield Company) and BHP Billiton Petroleum, he has held numerous global executive roles, and he also has extensive experience in the U.S. onshore horizontal drilling and fracing operations. Mr. Smith holds a BSc Hons degree from Nottingham University, England.

Winston M. Talbert

Independent Non-executive Director

Mr. Talbert has over 22 years of experience as a senior executive in the U.S. oil and gas industry, primarily at large and successful publicly-traded exploration and production companies.  Most recently, Mr. Talbert served as EVP and Chief Financial Officer of Sable Permian Resources and was formerly the CFO of Plains Exploration & Production until it was sold to Freeport-McMoRan, at which time he became the CFO of its affiliated partnership, Freeport-McMoRan Oil & Gas LLC.  Mr. Talbert has significant merger and acquisition experience, and he successfully arranged the financing of over $14 billion in acquisitions over a series of major transactions.  His knowledge of the capital markets and creative deal structures have allowed for the successful integration of the acquisitions.  Mr. Talbert has a B.B.A. from Southern Methodist University and an M.B.A. from Emory University.  Mr. Talbert will be based in Houston, Texas.

Heath A. Sumrow

Independent Non-executive Director

Mr. Sumrow is a Partner with Ramas Capital Management, and oil and gas focused investment firm based in Houston, Texas. He serves on the firm’s Investment Committee, which oversees all of the firm’s activities with regard to new investment opportunities, including identification, evaluation and execution In addition, Mr. Sumrow is charged with the active management of the firm’s portfolio companies, including, but not limited to, the oversight of all technical and operational matters. He has over 16 years of oil and gas industry and investment experience with a proven track record of value creation at both public and private exploration and production companies. Mr. Sumrow holds a B.S. in Petroleum Engineering from Texas Tech University and an M.B.A. from the University of Florida.

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