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About Us

Our Team

With decades of practical knowledge, ReEnergy Holdings’ senior team is among the industry’s most experienced in the management of renewable energy, recycling and waste management systems. ReEnergy Holdings LLC is a portfolio company of Riverstone Holdings LLC. ReEnergy Holdings owns and operates facilities that use biomass and waste residues to produce renewable thermal and electric energy. ReEnergy was formed in 2008 by Riverstone Holdings LLC and a senior management/co-investor team comprised of experienced industry professionals. ReEnergy has 260 employees and generates 240 megawatts of energy in four states.

Riverstone Holdings LLC, an energy- and power-focused private equity firm founded in 2000, has approximately $17 billion under management across six investment funds, including the world’s largest renewable energy fund. Riverstone conducts buyout and growth capital investments in the midstream, exploration & production, oilfield services, power and renewable sectors of the energy industry. With offices in New York, London and Houston, the firm has committed approximately $15.7 billion to 76 investments in North America, Latin America, Europe and Asia. For more information, visit www.riverstonellc.com.

ReEnergy’s Senior Management Team consists of:

Larry Richardson is a founder of ReEnergy, sits on ReEnergy’s Board of Directors, and is a member of the Company's Executive Committee. He was formerly President and Chief Operating Officer of EAC Operations, Inc., a company that owned and operated waste-to-energy facilities and related businesses for the collection, processing and transportation of solid waste and recyclable materials.


Before working at EAC, he held management, project development and technical positions at companies including ABB/Combustion Engineering, Halliburton/Brown & Root and HDR Engineering. Larry is a licensed professional engineer.

Thomas Beck is a founder of ReEnergy, sits on ReEnergy’s Board of Directors and is a member of the company’s Executive Committee. He was a consultant to the solid waste and renewable energy industries for three years before the formation of ReEnergy Holdings.


Before that, Tom was a Vice President of American Ref-Fuel Company and President of TransRiver Marketing Company. American Ref-Fuel was an owner and operator of waste-to-energy facilities and associated waste operations with annual revenues in excess of $500 million.

William Ralston is a founder of ReEnergy and is a member of the company’s Executive Committee. He was formerly General Counsel for EAC Operations, Inc. At EAC, he was involved in numerous acquisitions, project development initiatives, project restructurings and financings. Prior to joining EAC, he was in private practice with law firms in Albany, N.Y., with focus on the development and financing of independent power projects. Bill is a member of the New York State Bar.

Gregory Leahey is a founder of ReEnergy and is responsible for overseeing the company’s asset management initiatives, including operation of fuel supply, energy management and non-energy assets.


He was formerly Vice President–Recycling and Waste Services at EAC Operations, Inc. In that role, Greg had profit and loss responsibility for all of EAC’s waste procurement, waste collection, waste transfer, landfill and recycling activities. Greg also was responsible for the acquisition of a number of waste collection and transportation companies, and negotiation of strategic waste and disposal contracts.

James White is responsible for the operation of all of the company’s green energy assets and leads the company’s health and safety program. Before joining ReEnergy in June 2011, Jim was General Manager at NextEra Energy, Inc. (formerly Florida Power & Light), a leading clean-energy company with approximately 43,000 megawatts (MW) of generating capacity and approximately 15,000 employees.


Prior to that, he was with American Ref-Fuel Company, where he held various engineering and management positions, including Plant Manager. Jim holds a 3rd Class Stationary Engineers license in Massachusetts, Six Sigma Green Belt and 3rd Assistant Engineering license from the U.S. Coast Guard.

Stephen Hall is responsible for the company’s involvement in industry associations and interactions with officials in the communities and states in which ReEnergy is a corporate citizen. Before joining ReEnergy, Steve was a regional business development manager Bluewater Energy Solutions, where he provided project development and technical support services to various organizations.


Prior to that, he worked for 17 years at Boralex Stratton Energy in Maine, which is now a ReEnergy facility. Steve holds a 1st Class Stationary Engineer’s license in Maine.

Keith Behrens is responsible for the oversight of all accounting, treasury and financial reporting activities. Before joining ReEnergy in 2009, Keith held similar positions with General Electric’s Power Systems Group and EAC Operations, Inc. In addition, he spent nearly 14 years in a variety of finance positions with KeyCorp and six years with Ernst & Young, LLP.

Michael Buckley is responsible for the management of market and customer interactions for all of ReEnergy’s Northeast U.S. operations. Before joining ReEnergy, Mike worked with Covanta Energy for two years, where he was a business manager for a regional operation that included waste-to-energy facilities, landfills and transfer stations, and with EAC Operations for seven years, where he was marketing manager for EAC’s Northeast U.S. operations.

Ainsworth James, Manager of Engineering and Maintenance, is responsible for leading ReEnergy’s engineering team to increase power generation capabilities across the portfolio through improvements to plant reliability, capacity and efficiency. A.J. began his career with the U.S. Naval Service, and then worked for 10 years at American Ref-Fuel in increasingly senior positions. He also worked for AarhusKarlshamn USA and InnovativEnergy.

Eric Dumond, Wood Procurement Manager, is responsible for the coordination of fuel purchasing activities to ensure the proper implementation of the fuel plan and management of wood fuel inventory. Eric has more than 30 years of experience in the forest products industry. He worked for 10 years at Boralex, procuring wood fuels for its biomass facilities in Maine.