Executive Team

Adam Comora is the Co-Chief Executive Officer of OPAL Fuels and has co-led the company since it was formed in December 2020. From February 2011 until January 1, 2022, Mr. Comora was with Fortistar, a privately-owned investment firm that provides capital to build, grow and manage companies that address complex sustainability challenges, where among other positions he served as President and Chief Executive Officer of TruStar Energy (now the fuel station services segment of OPAL Fuels).

Prior to joining Fortistar, Mr. Comora was a partner at EnTrust Capital, an asset management firm based in New York City, where he was an integral part of the investment team managing long only equities, a long/short strategy, and a fund of funds.

Prior to EnTrust, Mr. Comora was an Analyst and Associate at JP Morgan Investment Bank from 1994 to 1998.

Jonathan Maurer is the Co-Chief Executive Officer of OPAL Fuels and has co-led the company since it was formed in December 2020.

Previously, Mr. Maurer worked for more than thirty years at Fortistar, a privately-owned investment firm that provides capital to build, grow and manage companies that address complex sustainability challenges. There he was Managing Director and Co-Head of Fortistar’s Investment Team and led all management and investment activities associated with Fortistar’s renewable natural gas, landfill gas to power, and biomass energy investments. Mr. Maurer also served as a member of Fortistar’s management and investment committees.

Prior to Fortistar, Mr. Maurer was a commercial banker with JP Morgan Chase & Co.

Darrell P. Birck is the Executive Vice President of Biogas for OPAL Fuels since 2024. Mr. Birck brings over 25 years of proven leadership experience in energy industry engineering, construction and business optimization.

Prior to joining OPAL Fuels, Darrell served for over a decade at Koch Industries, including as Senior Vice President for Project Operations at DEPCOM Power, a leading solar energy solutions provider. Before DEPCOM, Darrell was a Senior Director of Operations at Georgia Pacific Corrugated, one of the world's leading manufacturers of tissue, pulp, packaging, and building products, and Vice President of Operations for Biofuels & Ingredients at Flint Hill Resources, overseeing eight biorefineries. Previously, Darrell spent 19 years at Cytec Solvay Group, a specialty chemicals and materials technology company, serving in various positions, most recently as a multi plant manager.

John Coghlin is General Counsel and has been with the company since June 2021.

Prior to joining OPAL Fuels, Mr. Coghlin served as Senior Vice President and General Counsel of Colt Defense, a manufacturing firm based in West Hartford, Connecticut. From 2007 to 2014, he served as the Chief Operating Officer and General Counsel at Healthcor Group, a global registered investment advisor. Prior to Healthcor, Mr. Coghlin served as Senior Vice President and General Counsel of the Operations Division of Citizens Financial Group.

He began his career as an associate with the law firm of Rogers & Wells.

Kazi Hasan is the Chief Financial Officer of OPAL Fuels having joined in February 2025. Mr. Hasan has over 25 years of extensive financial, operational, and strategic leadership experience in the energy sector driving disciplined growth and value creation.

Prior to joining OPAL Fuels, Mr. Hasan served as Senior Advisor at Fluence Energy (Nasdaq: FLNC), and as EVP and Chief Financial Officer at Puget Sound Energy and Cleco Corporate Holdings in Washington and Louisiana, respectively. Prior to these roles, Mr. Hasan spent more than two decades with publicly traded AES (NYSE: AES) in senior Global and Regional top executive roles, including as Global Chief Risk Officer. He also served as a Board member for various public and private companies. Mr. Hasan is a Chartered Financial Analyst and holds an Engineering degree and multiple Masters degrees in Business Administration and Leadership.

David Unger is an Executive Vice President of OPAL Fuels and has been with the company since December 2020. Mr. Unger served at Fortistar from February 2018 until January 1, 2022, where he served as a Senior Vice President.

Mr. Unger previously worked for Waste Management, Inc. for 23 years and developed their renewable natural gas (RNG) and compressed natural gas (CNG) monetization lines of business.

Mr. Unger has developed over 70 renewable energy facilities, including RNG, landfill gas (LFG) to electricity, and Solar. Mr. Unger managed Waste Management’s California CNG truck assets, monetizing both internally produced RNG and third-party sources RNG.

In 2015 and 2016, Mr. Unger was selected to Waste Management’s “Circle of Excellence” for outstanding achievement.