This is Our Story
EFI has been solving environmental containment challenges around the world for over three decades. The remarkable story of EFI’s Founder and Board Chairman, Dennis Shanklin, is captured in this newly released book An Accidental Environmentalist.
Sewage pools, both livestock and human, are a major but hidden source of methane and other heat-trapping gases in the atmosphere. Covering those pools and channeling those gases for productive use is not a big technical challenge, but implementing these solutions in the real world has been difficult. While ideologically driven environmentalists struggled to sustain a business, Dennis Shanklin responded pragmatically to the market needs and developed solutions that worked. He was drawn to hard problems and solved most of them. In overcoming a variety of macro- and micro-economic challenges - at one point sales were so poor that he mortgaged his house - he built a company called EFI and set an example of practical environmentalism that can inspire entrepreneurs in many areas of society. This is his story.
Meet the Executive Team
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Ben Wilson
PRESIDENT
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Jason Taylor
VICE PRESIDENT OF PRODUCTION
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Erica Chase
VICE PRESIDENT OF DEVELOPMENT
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Jim Jessup
DIRECTOR OF SALES
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Jeremy Coon
DIRECTOR OF FINANCE
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Dustin Green
DIRECTOR OF PRECONSTRUCTION
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Stephen Hannay
DIRECTOR OF OPERTATIONS
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Ryan Loguzzo
DIRECTOR OF SAFETY AND QUALITY
EFI Board of Directors
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Dennis Shanklin
FOUNDER AND CHAIRMAN OF THE BOARD
Dennis has over 30 years of experience solving some of the most complex environmental challenges. He is also a veteran of the US Navy.
Shanklin founded EFI in 1993, and built extensive expertise in civil engineering, environmental construction and product manufacturing. That knowledge helped EFI become the leading contractor for environmental containment and the biogas market. Today, EFI provides solutions that reduce air pollution and protect water resources.
For over 30 years, Dennis and EFI have led the industry in containment and bioenergy technologies designed to maximize operational efficiency, improve environmental impact and boost profitability for industrial, municipal and agriculture-based clients across the U.S. and around the world.
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Marc Fetten
OWNER AND BOARD MEMBER
Marc is an entrepreneur and investor with 25 years of experience in building, scaling, and aggregating energy, industrial and infrastructure platforms.
Marc is the Founder and Shareholder of GreenGasUSA, a highly successful renewable natural gas platform, Founder of CleanCycle Carbon, a carbon capture business; and Owner of EFI USA.
Marc has held global leadership roles in finance and operations in Europe, Asia and the Americas with Bayer AG, and has managed family office and PE backed investment platforms. Over the past decade, he has founded and managed three businesses from start up through exit in energy, renewables and infrastructure.
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Paul Raffle
BOARD MEMBER
Paul Raffle oversees all aspects of EFI’s financial operations and acquisition strategies. With a global background in finance and operations, Paul plays a key role in supporting the ownership group and executive management of the business.
Paul began his career at PricewaterhouseCoopers in the UK, leading audit, corporate finance and transactional support assignments across Europe, the U.S., and Africa. He later served as a partner at Arcadia Publishing, where he led Finance and Operations across offices in the U.S., UK, France, and Germany. Between 2018 and 2025, Paul was as a partner and Chief Financial Officer at GreenGas USA, where he also led the company’s Transportation division.