We Are OneNexus Environmental

A Financial Assurance Company Providing Responsible
Asset Retirement Obligation Solutions to the Energy Industry.

A Trillion Dollar Problem

One of the keys to achieving a sustainable global energy infrastructure is the responsible and timely retirement of energy producing assets once those assets have reached the end of their useful lives.

Today’s energy sector is facing a growing number of inactive and unplugged non-producing wells along with their associated facilities, presenting a trillion-dollar problem for the energy industry, it’s investors and stakeholders, and ultimately taxpayers.

Posing significant environmental risks as sources of methane emissions and groundwater contamination, these unplugged wells are a problem that will ultimately continue to grow in magnitude if not proactively addressed today. Addressing this issue represents an important step towards meeting global greenhouse gas reduction goals.

Who Are We

OneNexus is an Environmental, Social and Governance (ESG) oriented solutions provider with the singular focus of enabling energy companies to manage their Asset Retirement Obligations (AROs) easily and effectively.

We combine data science, operational know-how, and an innovative insurance-based funding structure in working with energy companies to keep decommissioning costs low while ensuring operational excellence.

OneNexus leverages its extensive experience in petroleum engineering, procurement, construction, finance, land leasing, regulatory, and project management as an industry-leading participant in the global energy transformation to a low-carbon and sustainable industry.

The OneNexus Solution

Guaranteed Asset Retirement

OneNexus offers E&P companies a well-capitalized, investment grade entity as a guaranteed “final buyer” of their oil & gas assets. The E&P company enters into an agreement with OneNexus, providing the company (or any future owners of the asset) a “put option” to divest the asset to OneNexus at the time of the E&P company’s choosing. Once the asset is transferred, OneNexus assumes the asset’s title, operatorship, and all future liabilities; OneNexus clients no longer need to worry about the actual decommissioning and surface remediation of the asset, nor any future liabilities or remaining obligations. OneNexus acquires these assets for the singular purpose to decommission and retire them safely, responsibly, and systematically.

A Unique FinTech Solution that Promotes Sustainable Oil & Gas Operatorship

OneNexus ensures the proper plugging of oil and gas wells, facility decommissioning, and surface restoration by providing two main offerings:

  • Assurance for the closure of currently producing wells and associated facilities
  • Capital financing for inactive wells and facilities that are no longer producing, including any current backlog inventory of idle wells requiring near-term plugging

A First-of-its-Kind “Transition” Operator of Oil & Gas Assets

For the first time, E&P operators have a guaranteed transferee for their non-commercial assets allowing them to focus on their core business activities. The sole purpose of OneNexus as an operator is the plugging and abandonment, and associated surface remediation of hydrocarbon producing assets. Energy producers can rely on OneNexus to perform all plugging & abandonment work, including all necessary regulatory, engineering, logistics, and environmental remediation in compliance with all local, state, and federal regulations. Aggregating liabilities provides the economies of scale that allow OneNexus to keep costs low and to explore and develop new technologies which will improve the efficiency and quality of the decommissioning work.

Above all, health, safety, environment, and quality (HSEQ) are critical to how we operate.


We partner with onshore companies to responsibly assess, plan and manage the execution of plugging, decommissioning, and retiring of assets.

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Our offshore experts ensure the experience and reliability needed for the proper decommissioning or repurposing of assets.

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We offer a fully vertical solution for the decommissioning of assets that is both environmentally responsible and financially viable for oil and gas companies. OneNexus is able to provide financial solutions for assets at any point in their lifecycle.

OneNexus Solutions Provide Significant Risk Mitigation

  • Well Underperformance Risk: If a well comes offline earlier than anticipated, it is still covered
  • Cost Variability with Aging Assets: Older Assets typically have higher costs and more uncertainty
  • Inflation Risk: Costs are set today and locked in for future need
  • Predecessor-in-Interest Liability Exposure Risk: The decommissioning and retirement obligation stay with the asset, therefore so does the risk
  • Business Risk: Ensuring the closure of the wells in a timely manner helps maintain trust and limits risks
  • Commodity Price Risk: Financial impact of ARO is not dependent on changes in the market

Our offshore decommissioning team comprises industry experts with unsurpassed technical skill in the marine and energy industries. Our team’s experience gives us the unique ability to provide world-class services while achieving the highest industry standards.

OneNexus provides a systematic solution for the industry, by the industry.

We built our platform by integrating exceptional energy industry expertise with the latest developments in data science and predictive analytics. This, coupled with ample capital reserves from investment-grade partners, enables us to efficiently retire assets at low costs and at an unprecedented scale.

Our Belief In Responsibility

OneNexus believes that an essential component of responsibly sourcing hydrocarbons is to properly plan for the eventual retirement and decommissioning of these assets at the end of their useful life. Our solutions align with ESG goals by addressing the mounting number of inactive and orphaned wells which contribute to greenhouse gas emissions and financial liabilities of the energy industry.

Idle wells carry significant environmental and climate related risks which can lead to business risks.

  • Fugitive GHG emissions (Including methane)  
  • Soil Contamination
  • Water Contamination

Responsibility does not end when assets stop producing.

We help companies to meet their ESG goals by providing external assurance for environmental and social responsibilities. Ensuring the safe and timely retirement of an asset is part of a sustainable consumption pattern, prevents contamination of water and aligns with the United Nations Sustainable Development Goal 6 and Goal 12 of the 2030 Agenda for Sustainable Development.

Learn more about our custom solutions.


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Meet Our Team

Our team comprises industry experts with decades of experience in the energy, financial, and environmental fields. Our expertise is what drives the OneNexus difference.

Tony Sanchez III

Tony brings over 20 years of experience in the energy, finance, and technology industries. He was most recently Co-founder and Executive Chairman of the Board of Sanchez Midstream Partners (NYSE: SNMP), a publicly-traded midstream company with assets that include interests in natural gas gathering and processing.

Tony was also Co-founder, President, and CEO of Sanchez Energy Corporation, a multi-billion energy production company with assets in the Eagle Ford Shale of South TX. Tony’s prior experience includes finance and analysis positions at JP Morgan Investment Banking, where he worked as an analyst in the Industrials and Natural Resources group, and at Zix Corp. (NASDAQ: ZIXI), a publicly-traded specialty provider of encryption and data privacy software, where he held various positions in product development, marketing, and subsequently served on the Board of Directors for several years.

Tony holds an MBA from the Harvard Business School and a B.S. in Finance and Accounting with a minor in Economics from Georgetown University.

He currently serves on the Board of Trustees at Texas Children’s Hospital, the Awty International School, and Strake Jesuit College Preparatory.

Dan Furbee

Dan has over 16 years of experience in the energy industry, most recently as EVP and COO of Riviera Resources. His prior experience includes serving as VP of Business Development, Strategic Planning & Reserves for Sanchez Energy Corporation, and various reservoir and production engineering roles at Linn Energy, LLC.

Dan is a graduate of Marietta College with a degree in Petroleum Engineering. He earned an MBA from the University of Houston and is a Registered Professional Engineer.

W. A. “Beau” Bisso

Beau has over 30 years of major capital project experience with Bisso Marine, the largest privately-held domestic offshore midstream infrastructure and subsea contractor. His roles range from Field Superintendent to Board of Directors. 

Beau's operating areas include US GoM, Mexico, Trinidad, South America, and Southeast Asia. and hi expertise includes project execution & management, heavy lift, pipeline installation, complete facilities decommissioning, salvage & wreck removal, diving, and corporate Finance.

Beau holds a BA from Loyola University.

Gerry Willinger

Gerry brings over 25 years in the energy and finance industries with leadership experience in structured finance, capital markets, and business development. He is currently the CEO and co-founder of Evolve Transition Infrastructure LP (formerly Sanchez Midstream Partners, LP). Willinger currently focuses on sustainable development solutions for the energy industry. He holds board positions in public and private corporations as well as nonprofit organizations.
Gerry is a graduate of Cornell University with a Bachelor of Science, Applied Economics and Business Management. He earned an MBA from The Wharton School, the University of Pennsylvania with an emphasis in finance.

Alexander Aalders

Alex has over 20 years of major capital project experience for Global Industries (the world’s largest offshore heavy construction company—now TechnipFMC) and Williams (Operator for both pipelines and wells).

Alex's roles range from Field Engineer to Division Manager, and operating areas include US GoM, Mexico, Israel, Thailand, and West Africa.

His expertise includes project execution and management, heavy lift, pipelay and construction, shore crossings, decommissioning, salvage, diving, burial, contract negotiation, risk identification and mitigation, builder’s risk, and claim management assurance, for project values more than $1B USD. MS Civil Engineering, Tulane University.

P. Martial Burguieres

Martial has over 20 years of wells and subsea experience at companies including Weatherford, Oceaneering, and Wild Well Control.

Martial has performed workover and abandonment operations conventionally and developed several patented unconventional abandonment processes.

He has engaged with regulatory bodies in various regions to address P&A requirements and developed the first "Riserless" abandonment system for deepwater wells. 

At Wild Well, Martial was responsible for the Unconventional Marine (shipstruck platform, hurricane downer), WellContained (subsea capping operations), and Subsea (riserless workover and P&A) groups.

Henry Yu

Henry has over 20 years of experience in the E&P and oilfield services sectors and was most recently the Completion Manager at Sanchez Energy where he managed a budget of over a billion-dollars in the Eagle Ford shale.
Henry began his career as a field engineer with Schlumberger then, moved to a role as engineering supervisor at Occidental Petroleum. He has worked in both conventional and unconventional oil and gas plays and specializes in well cementing, hydraulic fracturing, well completions, and abandonment.
Henry is a graduate of University of Texas, Austin with a B.S. in Chemical Engineering.

Marko Dodig

In his most recent role, Marko served as Head of Project Controls for Covestro (formerly Bayer Material Science) in North America.

His prior experience includes leadership of Operational Excellence and Supply Chain teams for Bayer Technology Services.

Marko holds a PhD in Systems and Engineering Management from Texas Tech University and has earned an MBA from the University of Houston.

Jennifer Ofsowitz

Jennifer has over 20 years of experience in the onshore domestic upstream oil & gas industry, with a focus on facility design and production engineering, including well abandonment.
Prior employment includes ExxonMobil, Burlington Resources, LINN Energy and Sanchez Energy Corporation.
Jennifer is a graduate of University of Texas, Austin with a degree in Mechanical Engineering.

Meghan Spicer

Meghan has over 15 years of experience in marketing and communications in the energy and insurance industries. Prior experience includes serving as Senior Consultant for Triverus Consulting (Boston,MA) and Future Align Inc. (Houston,TX) where she supported government agencies and major energy companies.
She held various in-house marketing and communication roles at Sanchez Energy Corporation and Nationwide Betterhealth Insurance (Solon, Ohio).
Meghan is a graduate of the University of Akron, with a bachelors degree in Visual Communications and is a current MBA candidate at the University of Houston.