Leadership Team
"*" indicates members of both the Executive Committee and the Board of Directors
Guale
Ramirez, P.E.*
Guadalupe "Guale" Ramirez, P.E., has over 40 years of experience in petroleum engineering and serves as Chairman and CEO of Ryder Scott Company. He earned a bachelor’s degree in Mechanical Engineering from Texas A&M University in 1976 and has completed advanced training in reservoir engineering, well log evaluation, waterflooding, and other specialized areas. This robust foundation has been instrumental in his career progression and technical expertise.
Joining Ryder Scott in 1981 as a reservoir engineer, Guale advanced through key roles, including President, Vice President, and Managing Senior Vice President. He has led over 50 international projects focused on reserves certifications, economic evaluations, and thermal recovery studies. Fluent in English and Spanish, Guale is a licensed Professional Engineer in Texas and a trusted expert in SEC and SPE-PRMS reserves definitions. His leadership has driven Ryder Scott’s growth into midstream consulting and sustainability studies, ensuring its position as an industry leader.
Herman G.
Acuña, P.E.*
Herman G. Acuña, P.E., serves as President of Ryder Scott, bringing over 30 years of experience in petroleum engineering and project management. He holds both a Master’s (1989) and a Bachelor’s (1987) degree in Petroleum Engineering from the University of Tulsa, with additional training through Exxon-sponsored industry seminars. His technical expertise includes reserves evaluations, integrated reservoir studies, and advanced simulation techniques.
Herman has led high-profile projects in the Middle East, South America, and Central Asia, guiding major clients like ADNOC and ECOPETROL through complex evaluations. Fluent in English, Spanish, and German, Herman is a licensed Professional Engineer in Texas and an active member of SPE and AIPN. Since joining Ryder Scott in 1997, he has played a pivotal role in the company’s growth, with contributions to training, litigation support, and Carbon Capture and Storage (CCS) initiatives.
Tosin
Famurewa, P.E.*
Tosin Famurewa, P.E., is an Executive Vice President at Ryder Scott with over 20 years of production, project controls, reservoir engineering, and management experience in operations, asset teams, joint ventures, and consulting environments of the energy business. He holds dual bachelor’s degrees in chemical engineering and Materials Science/Engineering from the University of California at Berkeley (2000) and a master’s degree in petroleum engineering from the University of Southern California (2007). He currently manages global multi-disciplinary teams evaluating resources for acquisition, divestiture, strategic planning, capital rounds, and regulatory filing purposes.
Tosin’s major clientele includes Chevron, BP, ExxonMobil, ADNOC, ANPG, Sonangol, NNPC, Pemex, Ecopetrol, Seplat, Conoil, Famfa, Shoreline, Green Energy, RSK, Perenco and Kosmos. A previous Chairman of the Society of Petroleum Evaluation Engineers, Houston Chapter, his leadership continues to drive Ryder Scott’s reputation as a leader in global energy consulting.
Eric T.
Nelson, P.E.*
Eric T. Nelson, P.E., serves as an Executive Vice President of Engineering at Ryder Scott, with over 20 years of experience in reservoir engineering and consulting. He holds a Bachelor of Science in Chemical Engineering from the University of Tulsa (2002) and a Master of Business Administration from the University of Texas (2007). His expertise spans performance analysis, volumetrics, and material balance techniques for global projects.
Eric has led comprehensive reserves evaluations and audits for clients with assets in the Gulf of Mexico, Brazil, Venezuela, Africa, and offshore Australia. His proficiency in SEC and SPE-PRMS reserves definitions ensures compliance with industry standards. A skilled leader of multi-disciplinary teams, Eric has contributed to high-profile projects, including acquisition and divestiture transactions. He is committed to fostering strong client relationships and advancing operational excellence within Ryder Scott's engineering division.
"*" indicates members of both the Executive Committee and the Board of Directors
Guale Ramirez, P.E.*
Guadalupe "Guale" Ramirez, P.E., has over 40 years of experience in petroleum engineering and serves as Chairman and CEO of Ryder Scott Company. He earned a bachelor’s degree in Mechanical Engineering from Texas A&M University in 1976 and has completed advanced training in reservoir engineering, well log evaluation, waterflooding, and other specialized areas. This robust foundation has been instrumental in his career progression and technical expertise.
Joining Ryder Scott in 1981 as a reservoir engineer, Guale advanced through key roles, including President, Vice President, and Managing Senior Vice President. He has led over 50 international projects focused on reserves certifications, economic evaluations, and thermal recovery studies. Fluent in English and Spanish, Guale is a licensed Professional Engineer in Texas and a trusted expert in SEC and SPE-PRMS reserves definitions. His leadership has driven Ryder Scott’s growth into midstream consulting and sustainability studies, ensuring its position as an industry leader.
Herman Acuña, P.E.*
Herman G. Acuña, P.E., serves as President of Ryder Scott, bringing over 30 years of experience in petroleum engineering and project management. He holds both a Master’s (1989) and a Bachelor’s (1987) degree in Petroleum Engineering from the University of Tulsa, with additional training through Exxon-sponsored industry seminars. His technical expertise includes reserves evaluations, integrated reservoir studies, and advanced simulation techniques.
Herman has led high-profile projects in the Middle East, South America, and Central Asia, guiding major clients like ADNOC and ECOPETROL through complex evaluations. Fluent in English, Spanish, and German, Herman is a licensed Professional Engineer in Texas and an active member of SPE and AIPN. Since joining Ryder Scott in 1997, he has played a pivotal role in the company’s growth, with contributions to training, litigation support, and Carbon Capture and Storage (CCS) initiatives.
Tosin Famurewa, P.E.*
Tosin Famurewa, P.E., is an Executive Vice President at Ryder Scott with over 20 years of production, project controls, reservoir engineering, and management experience in operations, asset-team, joint-venture, and consulting environments of the energy business. He holds dual bachelor’s degrees in chemical engineering and Materials Science/Engineering from the University of California at Berkeley (2000) and a master’s degree in petroleum engineering from the University of Southern California (2007). He currently manages global multi-disciplinary teams evaluating resources for acquisition, divestiture, strategic planning, capital rounds, and regulatory filing purposes.
Tosin’s major clientele includes Chevron, BP, ExxonMobil, ADNOC, ANPG, Sonangol, NNPC, Pemex, Ecopetrol, Seplat, Conoil, Famfa, Shoreline, Green Energy, RSK, Perenco and Kosmos. A previous Chairman of the Society of Petroleum Evaluation Engineers, Houston Chapter, his leadership continues to drive Ryder Scott’s reputation as a leader in global energy consulting.
Eric Nelson, P.E.*
Eric T. Nelson, P.E., serves as an Executive Vice President of Engineering at Ryder Scott, with over 20 years of experience in reservoir engineering and consulting. He holds a Bachelor of Science in Chemical Engineering from the University of Tulsa (2002) and a Master of Business Administration from the University of Texas (2007). His expertise spans performance analysis, volumetrics, and material balance techniques for global projects.
Eric has led comprehensive reserves evaluations and audits for clients with assets in the Gulf of Mexico, Brazil, Venezuela, Africa, and offshore Australia. His proficiency in SEC and SPE-PRMS reserves definitions ensures compliance with industry standards. A skilled leader of multi-disciplinary teams, Eric has contributed to high-profile projects, including acquisition and divestiture transactions. He is committed to fostering strong client relationships and advancing operational excellence within Ryder Scott's engineering division.
Dan
Olds, P.E.
Dan Olds, P.E., is a Managing Senior Vice President at Ryder Scott, bringing over 40 years of experience in petroleum engineering. He earned a Bachelor of Science in Petroleum Engineering from West Virginia University (1981) and a Master of Business Administration from the University of Houston (1991). His expertise includes reserves evaluations, economic analysis, and global initiatives in unconventional reservoirs, fiscal regime renegotiations, and acquisitions.
Dan has played key roles in complex financial modeling, tax analysis, and expert testimony for restructuring and bankruptcy cases. He has held leadership positions in professional organizations, including serving as President of the Society of Petroleum Evaluation Engineers. Dan’s contributions to the SPE PRMS guidelines and his management of high-stakes evaluations have solidified Ryder Scott’s reputation for technical excellence and strategic leadership.
Stephen E.
Gardner, P.E.
Stephen E. Gardner, P.E., is a Managing Senior Vice President and Manager of Ryder Scott’s Denver Office, with over 20 years of experience in reservoir and production engineering. He graduated summa cum laude from Brigham Young University in 2001 with a Bachelor of Science in Mechanical Engineering. His technical training includes expertise in reservoir engineering, reserves evaluation, statistical methods, and unconventional resource evaluation.
Stephen specializes in unconventional reservoirs and resource plays, leading a team responsible for reserves evaluations, economic assessments, and audits. His work in the Permian Basin, Eagle Ford, and other key unconventional plays demonstrates his proficiency in SEC and SPE-PRMS reserves definitions and decline curve analysis. Stephen’s leadership in integrating engineering, geological, and geophysical data has reinforced Ryder Scott’s reputation for high-quality, regulatory-compliant evaluations.
Ali A.
Porbandarwala, P.E.
Ali A. Porbandarwala, P.E., is a Managing Senior Vice President and Group Leader at Ryder Scott, with over 20 years of experience in reserves evaluations, economic assessments, and process audits. He holds a Bachelor of Science in Chemical Engineering from the University of Kansas (2001) and a Master of Business Administration from the University of Texas at Austin Executive Program (2007).
Ali specializes in SEC and SPE-PRMS reserves evaluations, advising clients on acquisitions, divestitures, and strategic decision-making. His experience spans upstream and midstream assets, with significant expertise in unconventional shale analysis and probabilistic evaluations. A past President of the Society of Petroleum Evaluation Engineers, Houston Chapter, Ali’s ability to integrate complex geological, engineering, and economic data has been vital to Ryder Scott’s success in global energy consulting.
Michael J.
Nowicki, P.G.
Michael J. Nowicki, P.G., is a Managing Senior Vice President and Group Leader at Ryder Scott, bringing over 45 years of geoscience experience to the firm. He holds a Master of Science in Geophysics from the University of Houston (1989) and a Bachelor of Science in Geology from Montclair State University (1978).
Michael specializes in integrated reserves evaluations, reservoir modeling, and seismic interpretation. His career spans domestic and international basins. His expertise includes deterministic and probabilistic methods, field development optimization, and expert witness testimony. With decades of experience at Ryder Scott and earlier roles at Image Energy and Panhandle Eastern, Michael’s deep understanding of geophysical and petrophysical systems has supported major oil and gas projects across the Gulf of Mexico, North Sea, Africa, and Southeast Asia. He is a member of AAPG and SEG.
Dan Olds, P.E.
Dan Olds, P.E., is a Managing Senior Vice President at Ryder Scott, bringing over 40 years of experience in petroleum engineering. He earned a Bachelor of Science in Petroleum Engineering from West Virginia University (1981) and a Master of Business Administration from the University of Houston (1991). His expertise includes reserves evaluations, economic analysis, and global initiatives in unconventional reservoirs, fiscal regime renegotiations, and acquisitions.
Dan has played key roles in complex financial modeling, tax analysis, and expert testimony for restructuring and bankruptcy cases. He has held leadership positions in professional organizations, including serving as President of the Society of Petroleum Evaluation Engineers. Dan’s contributions to the SPE PRMS guidelines and his management of high-stakes evaluations have solidified Ryder Scott’s reputation for technical excellence and strategic leadership.
Stephen Gardner, P.E.
Stephen E. Gardner, P.E., is a Managing Senior Vice President and Manager of Ryder Scott’s Denver Office, with over 20 years of experience in reservoir and production engineering. He graduated summa cum laude from Brigham Young University in 2001 with a Bachelor of Science in Mechanical Engineering. His technical training includes expertise in reservoir engineering, reserves evaluation, statistical methods, and unconventional resource evaluation.
Stephen specializes in unconventional reservoirs and resource plays, leading a team responsible for reserves evaluations, economic assessments, and audits. His work in the Permian Basin, Eagle Ford, and other key unconventional plays demonstrates his proficiency in SEC and SPE-PRMS reserves definitions and decline curve analysis. Stephen’s leadership in integrating engineering, geological, and geophysical data has reinforced Ryder Scott’s reputation for high-quality, regulatory-compliant evaluations.
Ali Porbandarwala, P.E.
Ali A. Porbandarwala, P.E., is a Managing Senior Vice President and Group Leader at Ryder Scott, with over 20 years of experience in reserves evaluations, economic assessments, and process audits. He holds a Bachelor of Science in Chemical Engineering from the University of Kansas (2001) and a Master of Business Administration from the University of Texas at Austin Executive Program (2007).
Ali specializes in SEC and SPE-PRMS reserves evaluations, advising clients on acquisitions, divestitures, and strategic decision-making. His experience spans upstream and midstream assets, with significant expertise in unconventional shale analysis and probabilistic evaluations. A past President of the Society of Petroleum Evaluation Engineers, Houston Chapter, Ali’s ability to integrate complex geological, engineering, and economic data has been vital to Ryder Scott’s success in global energy consulting.
Michael J. Nowicki, P.G.
Michael J. Nowicki, P.G., is a Managing Senior Vice President and Group Leader at Ryder Scott, bringing over 45 years of geoscience experience to the firm. He holds a Master of Science in Geophysics from the University of Houston (1989) and a Bachelor of Science in Geology from Montclair State University (1978).
Michael specializes in integrated reserves evaluations, reservoir modeling, and seismic interpretation. His career spans domestic and international basins. His expertise includes deterministic and probabilistic methods, field development optimization, and expert witness testimony. With decades of experience at Ryder Scott and earlier roles at Image Energy and Panhandle Eastern, Michael’s deep understanding of geophysical and petrophysical systems has supported major oil and gas projects across the Gulf of Mexico, North Sea, Africa, and Southeast Asia. He is a member of AAPG and SEG.
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