Clean Energy
from the Sun

As a full service supplier, SunGas designs, fabricates delivers and commissions complete gasification systems for your project

SunGas provides proven gasification systems that transform woody biomass into the building blocks necessary for large scale production of renewable fuels and chemicals.

The SunGas gasification process produces at industrial scale clean, tar-free syngas essential for the production of gaseous and liquid biofuels, and biochemicals.

Commercially Proven
Guaranteed Performance
Clean Synthesis-Ready Syngas

Wood Yard and a Bio Syngas Facility with a Plant Worker

Convert wood processing or power facilities into biofuel production sites

SunGas can help transform existing and closed wood processing or power facilities into renewable fuel production sites that create almost zero localized air emissions while producing industrial scale amounts of biofuels including renewable natural gas, hydrogen, gasoline, diesel, jet fuel, methanol or biochemicals.

The SunGas gasification island provides the reliable and clean syngas needed to ensure biofuel production facilities meet their production goals by reducing down time and eliminating unwanted tars or oils.


less conventional air
pollutants than the existing
production facilities

SunGas is accessing biomass conversion, gas quality, clean-up, and processing know how and technologies from GTI

In the News

SunGas Renewables Selected to Supply Green Methanol for New Hydrogen and E-Methanol Facility in Australia

The $1.4 billion green hydrogen and methanol project at Bell Bay is expected to produce 300,000 tonnes of green methanol per year   Houston, TX (November 10, 2023) – SunGas...

SunGas Renewables Announces Beaver Lake Renewable Energy, a Green Methanol Facility in Central Louisiana

The nearly $2 billion facility to bring jobs and economic investment to Central Louisiana through energy innovation delivering lower-carbon marine fuels PINEVILLE, La. (July 26, 2023) – SunGas Renewables Inc....

SunGas announces the development of multiple Green Methanol Facilities

In support of a partnership with Maersk, SunGas announces the development of multiple US based production facilities that convert sustainably sourced forest residues to green methanol.   Houston, Texas and...

SunGas Renewables Inc. Announces Agreement with Arbor Renewable Gas

Global leader in decarbonization announces order for its System 1000 syngas production package   October 27, 2022 Houston, Texas SunGas Renewables Inc. (“SunGas”), a global provider of gasification systems for...

Our Leadership

Robert Rigdon

Robert Rigdon




David C. LaMont, Ph.D.

Senior Vice President
Corporate Development


Dan LeFevers

Daniel S. LeFevers

Vice President
Policy and Government Affairs


Andrew Kramer

Andrew Kramer

Vice President
Technology and Product Development



Clifton G. Keeler

Vice President
Business Development



Scott Sexton

Vice President



Griff Lane

Vice President
Commercial Operations



Terry Hughes

Vice President
Technical Services



Jane Kudinova

Senior Business
and Financial Analyst



Christa O’Neill

Human Resources/
Office Manager


David Nguyen

David Nguyen



Informational Resources

Please download these Renewable Natural Gas (RNG)-related presentations, reports, and brochures.

SunGas Renewables — Harnessing Clean Energy from the Sun


SunGas Renewables Gasification Island

Data Sheet

SunGas Gasification Technology Overview


Low-Carbon Renewable Natural Gas (RNG) from Wood Wastes

Site Specific Engineering Design Study

For more information, please contact us.

We welcome your inquiries for development of project opportunities or additional information.

SunGas Renewables
10713 W Sam Houston Pkwy N
Suite 600
Houston, TX 77064

Contact Us

Robert Rigdon

Mr. Rigdon brings decades of executive leadership to SunGas and has unparalleled experience leading the deployment of gasification systems globally.

From 2008 to 2020, Mr. Rigdon held executive leadership positions including the President and CEO at Synthesis Energy Systems, Inc., (SES) where he was responsible for overseeing the commercialization, implementation, and operation of SES’s gasification projects worldwide.

Under his leadership, SES commercialized gasification technology based on U-Gas® technology licensed from GTI. He played an integral role in establishing multiple business enterprises in China, which completed five industrial scale-gasification projects between 2008 and 2016, and established gasification technology and equity business platforms in Australia and Europe.

Prior to SES, Mr. Rigdon held senior positions in GE’s gasification business in a variety of capacities, and held positions of increasing responsibility in chemical manufacturing operations and development, construction, and start-up of large-scale facilities at Texaco. He has a Mechanical Engineer with a B.S. degree from Lamar University in Beaumont, Texas.

David C. LaMont, Ph.D.
Senior Vice President Corporate Development

Dr. LaMont is a recognized expert in thermal conversion energy technologies and has nearly two decades of experience in technology assessment, deployment and financing. Most recently, he led the technology commercialization group at GTI that created and spun out SunGas. Previously, he worked for 10 years in the global energy business for ConocoPhillips, leading efforts in business and technology analysis, large scale technology deployment and strategy and planning. He has also held roles in in two hydrogen and fuel cell technology startup companies. Dr. LaMont has a Ph.D. in chemical engineering from Washington State University and an MBA from the Kellogg School of Management at Northwestern University.

Daniel S. LeFevers
Vice President Policy and Government Affairs

Mr. LeFevers leads SunGas Renewable’s business development activities and has a 30-year career in the energy business working for a an Illinois utility focused on alternative fuel use in transportation, with Gas Technology Institute (GTI) in project and program development and with a privately held waste company in governmental affairs in Washington DC. Mr. LeFevers was one of the original GTI staff that helped to create SunGas Renewables which provides to the market a gasification syngas delivery system based on GTI developed technology. He has extensive governmental affairs experience in various States and in Washington D.C. and has collaborated with scientists and engineers to deploy energy technologies in projects throughout the United States. Mr. LeFevers has held various roles in business development and governmental affairs at Peoples Energy, Waste Management and GTI. He also led development and project efforts for a site-specific engineering design for an RNG production facility fueled by wood wastes. Mr. LeFevers has a BA in Speech Communication and MA in Organizational Leadership.

Andrew Kramer
Vice President Technology and Product Development

Mr. Kramer brings critical experience to the SunGas team with his years of experience directing the design, installation, and operation of U-GAS® gasification technology, which is the core technology in SunGas’ fluidized bed gasification product.

As Senior Director for GTI, he has overseen all aspects of design, installation, operation, and maintenance of GTI’s pilot-scale gasification and related facilities including fuel feeding, gas feeding, syngas cleaning, conditioning, and end-use systems. Mr. Kramer has deep knowledge of multiple gasification technologies using a variety of woody biomass feedstocks, and has been involved in integration of gasification technology in gas-to-liquid conversions processes, including the TIGAS™ (Topsoe Improved Gasoline Synthesis) process, Fischer-Tropsch, and methanation systems.

Mr. Kramer was also responsible for corporate safety at GTI. He has a bachelor’s degree in chemical engineering from Tri-State University in Angola, Indiana.

Clifton G. Keeler
Vice President Business Development

Mr. Keeler is the Vice President Product Line Management and Business Development and brings a wide range of leadership, technology, and operations experience in the gasification industry to SunGas.   Previous to his role at SunGas Renewables, Mr. Keeler was a Sr. Gasification Advisor to Reliance Industries during engineering, construction, start-up and operation of the world’s largest gasification facility in India.

Prior to his role at Reliance, Mr. Keeler held senior positions at CB&I, Phillips 66 and ConocoPhillips for commercialization, technology development, and licensing of the E‑Gas Gasification Technology.  He was the operations manager at the Wabash Gasification facility. Prior to Wabash, he worked in Dow Chemical’s Energy Research group where he was instrumental in the development and advancement of Dow’s Gasification technology. He holds a bachelor’s degree in Chemical Engineering from the University of Utah.

Scott Sexton
Vice President Engineering

Midwestern born chemical engineer who began career in operations with world’s largest ethanol facility in Decatur, Illinois, including world-scale, circulating-fluidized-bed, cogneration boilers. Long-term operations management of multiple, world-scale, Gulf Coast facilities including methanol, ammonia, hydrogen, carbon monoxide, oxygen, and basic chemicals expanded to global responsibilities. Business background includes global technology sales, marketing and business development. Retired US Navy Commander.

Griff Lane
Vice President Commercial Operations

Mr. Lane brings a broad range of experience and leadership in the commercial operations role at SunGas Renewables. Prior to joining SunGas, Mr. Lane led Rolls-Royce’s marine business in the Americas and served as its legal counsel. Mr. Lane started his career as a service engineer with Wärtsilä, attending power stations and ships around the world. After attending law school, Mr. Lane worked as a criminal prosecutor in Florida and then joined Rolls-Royce as legal counsel. Mr. Lane has a degree in marine engineering from the United States Merchant Marine Academy and a law degree from Florida State University College of Law. Mr. Lane is a member of the bar in Texas and Florida.

Terry Hughes
Vice President Technical Services

Terry Hughes grew up in central Florida whose father was a lifelong chemical plant operator. Terry was very hands-on from an early age and had a high interest in electrical and mechanical things, specifically. This interest and aptitude were commercialized beginning at about age 13 by becoming a residential electrician working with contractors wiring homes independently while not in school. This electrical skill set was solidified with advanced training and certification such that Terry provided round-the-clock electrical and instrumentation service to the Mulberry Phosphate chemical plant. While providing extensive service to the Mulberry plant, Terry also acquired complete process understanding which resulted in his promotion at a young age to manager of instrumentation and electrical service. Terry continued to advance his technical skills and acquired supervisory experience.

Chosen as one of two demonstration facilities by the United States Department of Energy, Tampa Electric built a fully integrated coal gasification combined cycle (IGCC) facility that operated throughout the 1990’s with over 18,000 hours of successful operation at scale proving the IGCC concept. Terry was perfectly suited to begin work with Tampa with his deep understanding of all things mechanical and electrical, complemented with a deep understanding of process, thermodynamics, and physics. While at Tampa, Terry helped the facility to succeed and exceed all expectations by promoting to operations and maintenance leader. Terry was involved with Tampa from concept through successful operations.

Terry became a subject matter expert (SME) by continuing to add to his skillset building on his natural aptitude and interests with his plant experience. In 1999, Terry became an independent SME providing expertise globally to gasification facilities. While traveling to Korea, India, China, Singapore, and several sites within the United States, Terry became very well-known for his troubleshooting, commissioning, and operational expertise in gasification. Terry’s expertise has been leveraged with very large global corporations including Bechtel, Duke Energy, Reliance, Linde, Shell, Exxon, and others. Terry contracted directly with the primary contractor or owner-operator of large facilities to provide high-value guidance regarding plant reliability and operations.

Beginning in mid-2021, Terry has worked directly with SunGas Renewables, a biomass-based, gasification company owned by GTI Energy in Chicago. SunGas has rapidly grown from a startup company with a proven gasification technology to a provider of engineering, equipment, and technical services in the biomass gasification business. Terry is currently Vice President of Technical Services at SunGas Renewables. In this role Terry provides foundational information regarding process controls, commissioning, process flowsheet optimization, training, operations, maintenance, reliability, and all practical aspects of plant operations.

Terry has additional interests and experiences including private pilot, scuba diving, motorcycles, and agriculture. Terry’s has innovative patented inventions to his credit personally, and patents assigned to entities he contracted with. Terry is married to his wife Debbie and lives in Houston, Texas.

Mrs. Kudinova, CFA brings nearly a decade of capital markets, macro research, and financial analysis experience. 

Most recently, Mrs. Kudinova worked in Oil & Gas equity research focusing on oil & gas macro, upstream E&Ps, super and mid-majors.. Mrs. Kudinova graduated with an M. A. in American Studies, Business Administration, and Psychology from Johannes-Gutenberg University in Mainz, Germany. She also holds a CFA charter, an M. A. degree in Literature from Middlebury College, and an MBA from Colorado State University.

Mrs. O'Neill brings 30 years of experience in office management, accounting and human resources to her role as Human Resources/Office Manager at SunGas.  Most recently she spent nearly 20 years as the Human Resources and Accounting Manager for a civil engineering firm with nearly 200 employees in multiple states.  Mrs. ONeill obtained her Associate degree as a Paralegal and Bachelor’s in Accounting at Boise State University and a Master’s degree in Human Resources Management from Villanova University.

Norwegian born and raised, Mr. David Nguyen brings a fresh view to SunGas Renewables with valuable professional experience. Prior to joining SunGas Renewables, Mr. David Nguyen served as Controller for a consulting company that specializes in providing energy and commodity trading solutions to the energy industry. Mr. David Nguyen obtained his Bachelor’s degree in Accounting from the University of Houston and holds a Certified Public Accountant license from the State of Texas.