Sustainability is too ambiguous. Our podcast defines it.


We started the Sustainability Defined podcast out of our shared passions for the environment, good conversation, and – of course – bad jokes. Since meeting at a DC happy hour in Spring 2016, the operation has grown from a spreadsheet of personal sustainability contacts to an acclaimed podcast that's downloaded in over 100 countries and listed as one of GreenBiz’s seven exceptional sustainability podcasts you should listen to. We hope you dig it!

The voices

Jay Siegel

Jay is an urbanist, an environmentalist, and (occasionally) a humorist. Focusing his career on the intersection of nature and the built environment, Jay is driven by communicating the “big picture” of sustainability to spur action towards a more resilient future. He likes live music and the feeling of importance he gets when hearing his own voice through a podcast.

Jay received his B.A. from the University of Michigan (Go Blue!) and his Master's of Urban Planning from Cornell University.

Email him at


Scott Breen

Scott is often described as a "funny Spock" with his combination of logic and jokes. He enjoys college hoops and bike riding everywhere. In fact, his favorite part of the day is when both he and the school crossing guard are dancing and saying good morning as he passes by on his ride to work.

Scott received his B.A. from Georgetown University and his J.D./M.P.A. from Indiana University.

Email him at

The research crew


Max Sall

Max is studying Environmental Studies and Chemistry. He hopes to one day go to medical school, or maybe become a climate scientist, or maybe even become an environmental lawyer. One thing is for certain though: Max will become an amateur beekeeper. You can spot Max by the Wilco patch on his backpack, the Wilco sticker on his laptop, or maybe the Wilco sticker on his reusable water bottle. Max loves podcasts, especially WTF with Marc Maron and Sustainability Defined.

Max will receive his B.A. from George Washington University in the Spring of 2019.

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Morgan Abbett

Morgan is passionate about sustainable international development and works as a civil engineer-in-training and sustainability consultant. On weekends, she farms organic wine grapes in Sonoma, California. Once at a green building conference, Morgan was awarded a badge with the title “Troublemaker.” She has strived to live up to that title ever since.

Morgan received her M.S. and B.S. in Environmental Engineering and African Studies from Stanford University.

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Lisa Pesok

Lisa is a mechanical engineer and designer, passionate about sustainability and podcasts! As a native New Yorker, she's curious about the urban landscape and architecture around her, so she's almost always looking up and blending in with the tourists...with a 99% chance there's a podcast going off in her headphones (and a super high chance that it's Sustainability Defined).

Lisa received her B.S. in Mechanical Engineering from Stony Brook University

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Shannon Parker

Shannon is currently a Master of Environmental Management student at Duke University interested in the intersection between business, the environment, and social entrepreneurship. In her little spare time, she is always on the move travelling the globe or exploring the outdoors through hiking, snowboarding, and scuba diving trips. Upon graduation from her master's degree, she hopes to work in supply chain management to support the development of transparent and ethical supply chains.

Shannon also has has BAs in Behavioral Biology and Psychology from Johns Hopkins University.

The marketing muscle


Carolyn Wensley

Carolyn's career has spanned the financial, non-profit, startup and property sectors. She has designed and led programs driving innovation for social and environmental impact. Carolyn is always seeking out mindsets, business models, and technologies that will drive sustainability forward.

If you have any ideas or thoughts on how to scale our podcast you can contact her at