Green Building United Staff


Executive Director

Alex Dews


Alex has spent the past ten years working on green building and urban sustainability in Philadelphia. Alex worked in real estate development prior to leading program implementation and progress reporting for Greenworks Philadelphia, the city's comprehensive sustainability plan. Alex is a LEED AP and received a BA in English from the University of Vermont and an MS in Sustainable Design from Philadelphia University where he is an Adjunct Professor in the School of Architecture.


Development Director

Margaret Salamon

Margaret brings over 15 years of experience in the nonprofit sector to Green Building United. Most recently she worked for the United Way of Greater Philadelphia and Southern New Jersey and prior to that the Center for Nonprofit Excellence in Albuquerque, New Mexico. Additionally, in her twenties, her partner and her hand-built a house made out of recycled materials that included passive and active solar, rainwater catchment, and grey and blackwater wetland systems. Margaret has a strong interest in the built environment, for advancing ecological solutions, and for issues around social equity and is excited to work to advance Green Building United’s mission.

Contact Margaret with questions regarding sustaining partnership.


Policy and Program Manager

Katie Bartolotta

Katie brings broad policy, campaign, and coalition building experience to her work as policy and program manager at Green Building United. In this role, Katie leads the organization’s local, state, and federal policy and advocacy efforts. In addition, she coordinates strategic initiatives including the Philadelphia 2030 District and the Delaware Pathways to Green Schools Program. Katie holds a bachelor's degree in political science from the University of Rochester.

Contact Katie with questions related to policy and advocacy.


Education and Engagement Manager

Leah Wirgau

LEED Green Associate

Leah has worked several years in outreach at state, federal, and non-profit organizations. She is also an Adjunct Professor in the Sustainable Design Department at Jefferson (Philadelphia University + Thomas Jefferson University) and an Instructor in the Sociology Department at Kalamazoo Valley Community College. Leah holds a Master of City and Regional Planning degree and Master of Environment and Natural Resources degree from The Ohio State University, and is a LEED Green Associate.

Contact Leah with questions regarding education, events, membership, and communications.


Director of Operations

Megan Slootmaker

Megan earned a BS in Chemical Engineering and minor in Environmental Science from Lafayette College. She worked for over 10 years as an IT project management consultant in London and Philadelphia with Accenture. After volunteering for several local organizations, she changed her career focus to the nonprofit sector. She has been working at Green Building United since the summer of 2010.

Megan works part time Monday through Thursday. Contact her with questions related to billing/payments, website issues or suggestions, or general organizational information.

Living Futures Partners

Platinum Partners