Founded in 2013, CleanBay Renewables harnesses science, technology and economics to tilt the balance back in favor of nature, while protecting the agricultural sector that provides a vital service to humanity.


Our vision is to create a sustainable economic model for the provisioning of energy, the processing of waste, and the return of nutrients to nature’s buffers, while operating in symbiotic harmony with the food production industry and the environment that supports it.  
Our Team


Thomas Spangler, Executive Chairman

Thomas is a former senior Department of Defense official and electrical engineer. He is an entrepreneur, startup investor and advisor to multiple defense, aerospace and investment concerns. He co-founded CleanBay Renewables and is Principal at Velos and Spangler Strategic Advisors.

Donal Buckley, CEO

Donal has over 20 years of international corporate experience, 14 of which were specifically in the biomass sector. He has international project finance experience, has prior CEO experience in AD and completed an executive education program at Stanford GSB. Donal is a biomass industry veteran with a scientific background.

Alan Gilbert, Chief Operations Officer

Alan has more than 20 years of international experience with 14 of those years within the renewables and biomass industry. He has held senior management positions in the agri-food sector and he successfully restructured a Latvian biomass business – increasing turnover fivefold, developing an energy project ready to finance – and also established the anaerobic digestion division, which went on to become one of the top AD solutions providers into the UK market.

Bryan Train, Chief Integration Officer

Bryan has over 20 years of international corporate and start-up experience. Prior to joining CleanBay, he led international business development for Globomass. He was a Managing Director of the Worsham Group, a family office focused on private investments in real estate, and was a co-founder and director of Asha Zuri Participacoes, which funded the development of 3,500 low income units in South Eastern Brazil. In addition, he held leadership and executive positions at Coloplast, GMAC and DuPont de Nemours.

Christi Hudgins, Director of Human Resources

Christi has a diverse human resource portfolio, with an ultimate focus on fostering the link between people and strategy, streamlining processes and implementing strategic initiatives to meet the global needs of CleanBay Renewables. In past roles, Christi organized satellite launches – from initial development stages to implementation – and engaged with senior government and military officials, media outlets and international guests in her roles at the National Oceanic and Atmosphere Administration, National Aeronautics and Space Administration.

Courtney Spangler, Director of Government Affairs

Courtney serves as chief lobbyist and policy advisor for government affairs. For more than 20 years, she has focused on environmental stewardship and economic development matters. Courtney also serves as land use expert for the firm’s development portfolio and advises on communication strategy and marketing.

Jason Levine, Chief Business Officer

Jason is a 30-year finance and growth-stage veteran whose operating experience includes roles of CEO, CFO, general counsel, and corporate development executive. Mr. Levine also has extensive venture capital and investment banking experience, having managed Boston University’s Community Technology Fund venture capital portfolio, Friedman, Billings, Ramsey’s merchant banking portfolio, and having structured over a billion dollars of structured finance transactions while at Tucker Anthony and Merrill Lynch. Jason is a co-founder of Cleanbay Renewables.

Kevin Hill, Chief Financial Officer

Kevin has more than 20 years of experience in commercial real estate, private equity and investment management. He has a transaction history that includes the acquisition and financing of more than 30 assets, with $900 million in debt and equity and total capitalization greater than $2 billion. He has executed equity and debt investments utilizing fund discretionary capital, institutional joint ventures and private-equity syndications.

Dr. Kristi Shaw, Director of Environmental & Regulatory Compliance

Kristi has expertise in estuarine and environmental sciences, bacterial community composition, and marine pathogens and their causes in human illness, and completed several studies associated with antimicrobial resistance, human exposure and environmental controls. She holds a Ph.D. in Marine, Estuarine & Environmental Sciences from University of Maryland, and a Master’s degree in Environmental Health from Johns Hopkins University.

Dr. Shawn Freitas, Chief Science & Technology Officer

Shawn has professional experience in a variety of organizations related to petroleum and renewable fuel/chemical production. In his most recent role, he worked at TRI, owner of the largest Fischer Tropsch biorefinery in North America and currently building the world’s first municipal solid waste (MSW) to jet fuels plant. Shawn’s experience also includes both lab and commercial-scale biomass and waste conversion technologies, as well as the associated methods and instrumentation required for their analysis.

William Taylor, Director of Construction Management

William has been in the construction industry for over 40 years, specializing in the infrastructure needed for site development. He operates in accordance with all OSHA regulations and has earned an “Outstanding” rating during inspections of jobs and he has a certification in Erosion and Sediment Control. William meets project deadlines and budgets, reviews costs and prevents variances. He has always followed company procedures to maintain a superior work environment, as well as monitored project activities to ensure that instructions are followed, deadlines are met and schedules are maintained.