Erin Cosgrove, Director of Regulatory Affairs

Prior to joining the staff of KEEA 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, Matt is directly responsible for all operations, staffing, membership, and funding. In addition to the EEA, Matt leads two state-based affiliate organizations: the Keystone Energy Efficiency Alliance (KEEA) and the Energy Efficiency Alliance of New Jersey (EEA-NJ). Before his time at the EEA, 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). He can be reached at

Mary Jacobson, Development Specialist

Mary joined the EEA team in January 2019 to manage and grow the Energy Efficiency Alliance’s 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 & Event Specialist

Before joining KEEA in May 2018, D. managed a federal anti-hunger program for seniors. She holds an MFA from Washington University in St Louis and a BA from Grand Valley State University. She has a background in teaching, farming, and nonprofit program management. D can be reached at​

Leann Leiter, Director of Legislative Affairs

Leann joined EEA 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