Erin Cosgrove, Director of Regulatory Affairs

Erin serves as the Director of Regulatory Affairs for the Energy Efficiency Alliance of New Jersey. Prior to joining the staff of the EEA-NJ in October 2019, Erin worked with the Delaware Riverkeeper Network, protecting the Delaware River and working to stop natural gas infrastructure through both ligation and advocacy. Erin earned her Juris Doctorate and Master’s Degree in Public Policy at Drexel University where she focused her studies on environment justice and hydraulic fracturing policy on the state level in Pennsylvania, New York, and Maryland. She attended undergrad at Temple University where she graduated with a dual degree in Film Production and Political Science. Erin can be reached at

Matt Elliott, Executive Director

Matt has spent over a decade working to advance state-level clean energy policies. As the Executive Director of the Energy Efficiency Alliance (EEA) family, Matt supports the policy goals of EEA-NJ and is directly responsible for the organization’s operations, staffing, membership, and funding. Matt also leads EEA-NJ’s sister organization, the Keystone Energy Efficiency Alliance (KEEA). Matt was formerly KEEA’s Senior Policy Associate before his promotion to the Executive Director position in June of 2016.

Before his time at at the Energy Efficiency Alliance, Matt worked to protect Pennsylvania’s national parks from harmful energy development. Prior to that, he spent a number of years advocating for clean energy policies in New Jersey, successfully securing cutting-edge policies to promote efficient buildings, as well as solar and wind power. Matt is a graduate of Vassar College (B.A., Environmental Studies).  Matt can be reached at:

Mary Jacobson, Development Specialist

Mary joined the team in January 2019 to manage and grow revenue streams. She started her career building grassroots support for energy efficiency in Massachusetts and New Jersey, and has spent the last fifteen years providing support for nonprofit development teams. Mary is a graduate of Fordham University (B.A., Classical Languages & Religious Studies). She can be reached at

D. Laninga, Communications & Events Manager

Before joining the Energy Efficiency Alliance in May of 2018, D managed a federal food access program for seniors. She holds an MFA from Washington University in St Louis and has a background in teaching, farming, and nonprofit program management. D. can be reached at

Leann Leiter, Director of Legislative Affairs

Leann joined EEA-NJ in December of 2020 to advance energy efficiency in the Mid-Atlantic. She brings experience in and a passion for the intersection of energy issues, climate, and health. Her background in research and advocacy at the state and local levels includes over five years of service with the Departments of Labor & Industry and Human Services for the Commonwealth of Pennsylvania. Most recently, she served as the Pennsylvania and Ohio Field Advocate for Earthworks. Leann earned her BA from Dickinson College and an MA in Sustainable Communities from Northern Arizona University. She can be reached at

Jeaneen Zappa, Director of Operations

With more than 20 years of professional experience spanning the for-profit, public, and not-for-profit sectors, Jeaneen’s expertise ranges from strategic planning to partnership and client relationships to program development. Prior to joining the EEA in August of 2020, Jeaneen was executive director of Conservation Consultants Inc., now part of Rebuilding Together Pittsburgh, which focuses on residential energy efficiency and healthy home performance.

Her previous professional roles include serving as the first Sustainability Manager for Allegheny County, Deputy Director of the Green Building Alliance, Director of Strategic Marketing for Descartes Systems Group, and Marketing Manager for Vocollect voice recognition technology. Her early career included work for University of Pittsburgh Medical Center and for the Pittsburgh Press, once the major daily newspaper in Pittsburgh.

Jeaneen holds a dual degree in Magazine Journalism and Marketing from Syracuse University and an MBA from University of Pittsburgh. She can be reached at​