Happy Holidays! We’re grateful for your support and wish you a joyful season.
Happy Holidays! We’re grateful for your support and wish you a joyful season.
Managing Senior Vice President, Group Leader, Sustainable Energy
The Ryder Scott Mission: To provide independent and expert guidance to our clients with the utmost professionalism and integrity.
The Ryder Scott Vision: Be the preferred oil and gas engineering and geological consultants known worldwide for quality, reliability, and integrity.
Independent reservoir engineering and economic evaluations for energy decisions.
PHDwin Week
PHDwin Week
Global Energy Consulting
Ryder Scott is the trusted authority in reservoir performance and energy transition—backed by 60+ professional petroleum engineers and geoscientists delivering hundreds of critical studies each year. With headquarters in Houston and offices in Calgary and Denver, we combine deep oil-and-gas heritage with pioneering low-carbon solutions to help clients thrive in a dynamic energy landscape.
Core Capabilities
Rigorous audits and resource assessments under SEC, SPE and international standards.
Advanced dynamic modeling to optimize production, injection and storage strategies.
End-to-end planning that balances technical performance, economics and environmental stewardship.
Customized financial analysis, incentive modeling and strategic advisory to maximize ROI.
Credible testimony, technical dossiers and permit applications for government and litigation.
As energy priorities shift, Ryder Scott has expanded our proven consultancy into critical low-carbon arenas:
45Q Tax-Credit Compliance & CO₂-EOR Economics
With over 25 years of global reservoir-engineering experience and a proven track record in CCUS and CO₂-EOR, Marylena leads Ryder Scott’s low-carbon practice—helping clients unlock the full value of 45Q tax credits while ensuring permanent, verifiable emissions reductions.
A recognized authority in carbon-storage certification and enhanced-recovery optimization, Marylena combines rigorous technical analysis with deep regulatory expertise to deliver end-to-end carbon management solutions.
CO₂-EOR Strategy & 45Q Optimization
SPE SRMS Classification
Carbon-Credit Integrity
Global Reserves Evaluations
Advanced Reservoir-Engineering Techniques
ConocoPhillips | Senior Reservoir Engineer
2007 – 2009
Occidental Oil & Gas | Reservoir Engineer
2005 – 2007
Occidental Oil & Gas / Oxy Middle East | Internship
2004
Texas A&M University | Teaching Assistant
2004
Petroleos de Venezuela, S.A. (PDVSA) | Reservoir Engineer
1998 – 2003
MS degree, petroleum engineering, Texas A&M University, 2005
BS degree, petroleum engineering, Universidad de Oriente, 1998
Our oil & gas experience underpins every phase of carbon management and storage, including a comprehensive CCUS & Carbon Management Services:
Ryder Scott’s expertise in the energy industry makes them the preferred consultant for companies seeking sustainable energy solutions.
PHDwin Week
Ryder Scott Company evaluates oil and gas properties and independently certifies petroleum reserves quantities in the U.S. and internationally. Founded in 1937, Ryder Scott is one of the largest, oldest, and most respected reservoir evaluation consulting firms in the industry.
Ryder Scott provides a complete range of professional engineering, geoscientific, and economic evaluation services.
Ryder Scott’s expertise in the energy industry makes them the preferred consultant for companies seeking sustainable energy solutions. Their combined RSC-GHGM and RSC-CREC services assist clients in achieving low-carbon and sustainable energy goals.
Ryder Scott has been the most widely used consulting firm for preparing annual petroleum reserves certifications for filers with the U.S. Securities and Exchange Commission. Ryder Scott also serves clients listed on the London, Toronto, Hong Kong, Australian, and other stock exchanges.
