Our Experts

David B. Goldstein

Energy Co-Director, Climate & Clean Energy Program

David B. Goldstein has worked on energy efficiency and energy policy since the early 1970s. He currently codirects NRDC’s Energy program. Goldstein has been instrumental in the development of energy efficiency standards for new buildings and appliances that are currently…

Eric A. Goldstein

Senior Attorney and Director, New York City Environment, People & Communities Program

More than three decades ago, Eric Goldstein helped create NRDC’s Urban program and spearheaded the nationwide public campaign to get lead out of gasoline. Since then, he has been one of New York’s leading environmental advocates on such issues as…

Kelsie Gomanie

Advocate, Climate & Clean Energy Program

Kelsie Gomanie focuses on electricity market issues and opportunities in the Western region in support of a carbon-free electricity system. Prior to joining NRDC, she advocated for legislation at the state level across the Western region to support renewable energy…

Ariana Gonzalez

Director, Equitable Policy, Climate & Clean Energy Program

Ariana Gonzalez provides guidance and support for nurturing more just, equitable, and inclusive processes, partnerships, and policies. She also acts as a liaison between her program and the newly created Environment, Equity, and Justice Center at NRDC. Prior to this…

Kabir Green

Director, Federal Affairs, Government Affairs

Kabir Green, who joined NRDC in 2012, focuses on public lands issues, especially NRDC’s efforts to defend America's national monuments. He graduated from George Washington University's Trachtenberg School of Public Policy & Public Administration with a master's in public administration…

Nathanael Greene

Senior Advocate, Renewable Energy, Climate & Clean Energy Program

Nathanael Greene specializes in researching, analyzing, and influencing policies related to renewables. Within the broad category of renewable energy, he has expertise in wind power, solar power, biofuels, biopower, emergent clean technologies such as batteries and fuel cells, and the…

Ashok Gupta

Senior Energy Economist, Climate & Clean Energy Program

Ashok Gupta focuses on policies relating to global warming, energy efficiency, renewables, sustainable building design, smart growth, and transportation. During former New York mayor Michael Bloomberg’s administration, Gupta served as NRDC’s representative to the Mayor’s Sustainability Advisory Board and Energy…

Irene Gutierrez

Senior Attorney, Nature Program

Irene Gutierrez protects our oceans by promoting sustainable fisheries, fighting illegal fishing practices, preventing dirty energy development, and supporting policies to curb climate change. Prior to joining the Oceans division, she was an attorney on NRDC’s Climate and Clean Energy…

Brendan Guy

Director, International Climate, International Program

Brendan Guy leads global strategy to enhance climate ambition from major emitters, primarily through the Paris Agreement and bilateral engagement. He also coordinates strategy to advance global conservation objectives. Guy has taught global climate policy at Oxford University’s Blavatnik School…

Angela Guyadeen

Director, Safe Water Initiative, People & Communities Program

Angela Guyadeen is responsible for developing NRDC's strategy to establish an enforceable human right to water that is safe, sufficient and affordable from source to tap. Guyadeen oversees the implementation of the Safe Water Initiative’s objectives and coordinates the Initiative’s…

Debbie Hammel

Deputy Director, Lands Division, Nature Program

As director of the Land Markets Initiative for NRDC’s Land & Wildlife program, Debbie Hammel concentrates on issues relating to bioenergy and sustainable forest management. With more than 30 years of experience in designing third-party environmental certification systems, she is…

Becky Hammer

Deputy Director, Federal Water Policy; Senior Attorney, Nature Program

Becky Hammer focuses on stormwater runoff, green infrastructure, low-impact development, water-pollution permitting issues, and climate change preparedness. Before joining NRDC in 2009, she interned at the U.S. Environmental Protection Agency. Hammer is a graduate of Harvard College and Harvard Law…

Kathy Harris

Senior Advocate, Clean Vehicles and Fuels, Climate & Clean Energy Program

Kathy Harris leads NRDC's work on clean vehicle policies and programs that accelerate the transition to zero-emission passenger cars and trucks. Prior to joining NRDC, she worked for the state of Delaware as a planner, addressing a variety of statewide…

David Hawkins

Director, Climate Policy, Climate & Clean Energy Program

David Hawkins joined the nascent NRDC in 1971 and has been with it ever since, minus the four years he spent working at the U.S. Environmental Protection Agency during the Carter administration. Upon his return, he dedicated much of his…

Samantha Henningson

Advocate, Clean Transportation, People & Communities Program

Samantha Henningson advocates for transportation options that are affordable, equitable, low-carbon, and maybe even joyful. Previously, in Saint Paul, MN, Henningson managed the EV Spot Network program—the nation’s first renewably-powered, municipally-owned carshare and curbside public charging network. Prior to that…