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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).
Matt was formerly KEEA’s Senior Policy Associate before his promotion to the Executive Director position in June of 2016.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

Julian Boggs

KEEA Policy Director 

Julian is responsible for developing and advancing KEEA’s policy agenda at the state legislature. He helped lead a coalition of business, labor, and environmental advocates to pass SB 234, legislation enabling Commercial Property Assessed Clean Energy in Pennsylvania, and is a leading voice in Harrisburg on energy efficiency policy. Prior to working at KEEA, Julian played a key role in defending progress on energy efficiency standards in Ohio and worked in Washington D.C. on federal clean energy policy. He has been an advocate for clean energy and energy efficiency policies since 2009. Julian has a Bachelor’s degree from Colorado College and can be reached at

Erin Cosgrove

Policy Counsel

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

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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 & Events Manager

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, and can be reached at

Matt Mahoney

Matt Mahoney

Western PA Program Manager

For 5 years, Matt worked with the Center for Responsible Shale Development, bringing shale developers and environmental groups to the table to mitigate harmful environmental impacts of drilling. Prior to that, Matt worked with the Veterans Leadership Program of Western Pennsylvania.


After realizing his true passion was clean energy, Matt earned a Masters Degree in Renewable Energy and Sustainability Systems from Penn State in 2019. A native Pittsburgher, Matt is committed to promoting clean energy solutions in and around his hometown, and working with businesses at the cutting edge of saving energy and creating jobs in the energy efficiency industry. He can be reached at

Diana Marques

Business Engagement Manager

Diana joined KEEA in 2017. As KEEA’s Business Engagement Manager, Diana works on a local and regional level to engage KEEA members, new partners and elected officials to highlight energy efficiency project and businesses. She strives to tell positive stories that advance energy efficiency policies in Pennsylvania, and can be reached at

Before coming to KEEA, Diana worked for the Pennsylvania State Legislature in both the House and Senate prior to moving into the non-profit sector, where she has served in policy, advocacy, and outreach roles in human services issues that affect communities and families across Pennsylvania. Diana is a graduate of Moravian College (B.A., Political Science) and Bryn Mawr College Graduate School of Social Work and Social Research (M.S.S.)