Tina Alt

Tina received her Bachelor of Science from The Catholic University of America and her master’s in health science from Quinnipiac University. She currently practices as a Physician Assistant working in college medicine. She worked in surgical specialties for 20 years in the greater Philadelphia area with a focus mainly on cardiac surgery. Tina has volunteered for multiple roles ranging from soccer coach to a member of school boards. She is very happy to be working with C Change fulfilling her desire to help the earth.  

Mary Bechler

Mary brings 25 years of experience in financial management and planning to C-Change Conversations.  She currently works as a senior associate dean for finance and administration in the Graduate School at Princeton University. Prior experience includes roles in international banking and real estate asset management. Mary has worked with a number of non-profits in Princeton, including 101: which provides college mentoring and need-based scholarships.

Kathleen Biggins

Founder & President & Presenter

Kathleen founded C-Change Conversations in 2014. Her previous experience includes co-hosting an internet radio show about Delaware Valley environmental issues and working with Ogilvy & Mather advertising agency in New York City and QLM Marketing in Princeton, NJ, where she lives. The New Orleans native was a reporter for The Times-Picayune after graduating from the University of Virginia and studying International Relations at the Albert Ludwig University in Freiburg, Germany, as a Rotary Scholar.

Mary Brophy

Mary is a Princeton resident since 2004 and has lived in Dublin, London, Cardiff, Chicago, Stockholm and Baghdad. Formerly a senior manager in PICU at Cardiff University Hospital Trust and a nationally known Lecturer in Child Health at the University of Wales, Mary still works as a School Nurse. An environmentalist, she was at the ground level to ban plastic bags. With Stony Brook Garden Club, Mary has lobbied in Washington DC at the National Affairs and Legislation Conference - addressing climate change and PFAS.

Carrie Dyckman

Vice President

Carrie has a background as a multimedia producer and web developer in New York. She is now an effective community activist focused on sustainability. As a current or former chair of The Stony Brook Garden Club Conservation, PDSeeds, and the Point O'Woods Environmental Committee, she has been active in campaigns to reduce idling, increase recycling, reduce single use plastics, plant Milkweed for Monarchs, and promote carpooling, EV cars, and community composting.

Sophie Glovier

Sophie has presented the C-Change Conversations Primer in 5 states. In her role as the Municipal Policy Specialist at The Watershed Institute she works with citizens and local government to develop and implement strong environmental policy.  She has served as Chair of the Princeton Environmental Commission and is the author of Walk the Trails In and Around Princeton, a book that has sold over 5,000 copies and raised over $10,000 for trail stewardship.

Robin Gosnell

A graduate of Dartmouth College and Columbia University School of Law, Robin is a retired attorney and mother of four. After practicing tax law in New York City and working for a boutique investment firm, she became active with the International Rescue Committee and now serves on its Board of Advisors. Robin is a past president of The Garden Club of Princeton, and currently serves on the vestry of Trinity Church and the Board of Trustees of Princeton Day School.

Kathy Herring


Kathy Herring had a 12 year career in marketing and public relations eventually becoming Director of Promotions and Marketing for Bobbi Brown Cosmetics. In 1998, she co-founded Twin Hens, a frozen chicken pot pie company that had national distribution. After 14 years, she closed the company and devoted her time to non-profit volunteer work, serving as Conservation Chair for Stony Brook Garden Club, and as board member for Young Audiences of NJ, Crawford House, and the Institute for Advanced Study.

Dallas Hetherington

Dallas's career began in global specialty chemicals concerns that spanned technologies such as adhesives, polymers and food ingredients, for customers like PepsiCo, Monsanto and Procter & Gamble. He is currently serving as president of the board of trustees of Raritan Headwaters Association, a water-quality watchdog in northern New Jersey. He knows that unless we act more decisively, millions of others around the world will pay an increasingly high price for a warming planet.

Katy Kinsolving

Katy Kinsolving is a food educator and writer with a background in non- profit management, public relations and special events. She has worked with a range of institutions from small social service organizations to major European museums.  She is co-author of Essential Flavors and writes the Good Food Naturally blog. In Princeton she served as an ambassador for the Princeton Township curbside composting program, and was a trustee of The Watershed Institute.

Margaret Koval

An Emmy-award winning journalist, Margaret is the Director of Special Projects for Princeton University's Office of Communications. Margaret wrote and produced for the ABC News programs "Nightline" and "20/20," then spent nearly 10 years making documentaries for PBS before jumping back into daily news as a senior editor for the public radio franchise "Marketplace." She also did stints with the Science Museum in London and at the University of Oxford. Margaret lives in Princeton, NJ.

Pam Mount

Pam serves on and is the founding chair of the board of Sustainable Jersey, a nonprofit that works to promote sustainability in municipalities across the state. The recipient of numerous awards, Pam served on Lawrence Town Council for 12 years and as Lawrenceville Mayor for 3 years. She was honored for her SustainableJersey work and NJBiz Magazine named her one of the top 50 women in business.  Pam and her husband own and run Terhune Orchards, a 200-acre sustainable produce farm and winery.

Pamela Parsons

Pam started her professional life in New York at Conde Nast Publications and J. Walter Thompson Advertising. She then moved to Princeton and co-founded Design III, a residential and commercial interior design company. Later she joined the Sotheby's affiliate N.T. Callaway Real Estate as Marketing Director, initiating and managing the firm’s advertising, web, marketing, and promotional programs. Pam has served on the boards of Young Audiences New Jersey Eastern Pennsylvania and The Princeton Family Center for Education.

Nick Perold

Nick is a Chief Marketing Officer working across climate, commerce, and culture. Nick was previously head of marketing at Bedrock Detroit, a multi-billion dollar catalytic real estate development firm in Detroit. Prior to that, Nick led strategy for global brands such as Rolex, Jaguar, and All Nippon Airways at the Brooklyn-based digital agency Carrot Creative (acquired by VICE Media). Nick lives on a small farm in central NJ where he’s raising kids in the house and capturing carbon in the soil.

Joan Schiller, MD

Dr. Joan H. Schiller is a widely published medical oncologist who is internationally recognized for her work in lung cancer clinical research. She is also passionate about climate change and its impact on health. She is the author of Global Warming, COVID-19, and Lung Cancer: Why Lung Cancer Doctors Should Care about Climate Change and Why Oncologists Should Care About Climate Change. She is currently a board member of the Lung Cancer Research Foundation, Adjunct Professor at the University of Virginia, and a member of OUCH.

Lorraine Sciarra

Lorraine has over 30 years of experience representing public charities and private foundations, including as General Counsel at National Audubon Society, as Senior Counsel at Princeton University, and as chair and member of numerous national and local boards. Before devoting her time and career to the mission-driven nonprofit world, she practiced tax-law at a national law firm and clerked at the U.S. Attorney's Office S.D.N.Y. and at the U.S. Court of Appeals for the Federal Circuit.

Catherine Sidamon-Eristoff

Catherine brings business, investment management and fundraising experience to C-Change Conversations. During her career, Catherine was a Managing Director, Advisory Director and Senior Relationship Manager at Morgan Stanley. She subsequently became a Managing Director at Constellation Wealth Advisors, and is a board member of FlexPaths LLC, a leading innovator in workplace change. Catherine is a trustee of the KKR Funds and a board member of numerous non-profits in New York and New Jersey.

Margaret Sieck

Margaret comes to C-Change Conversations from the world of sports editing, having worked at Boating and Sports Illustrated magazines, and at Sports Illustrated For Kids, where she started a book division for kids. In Princeton, NJ, she has been involved with the Friends of the Princeton Public Library and served as a long-time leader of the Garden Club of Princeton's conservation committee, and as a trustee of The Watershed Institute, where she’s on the Communications Committee and Advisory Board.

Yamile Slebi

Yamile Slebi is a native of Colombia where she practiced law and managed the foreign investment division of a boutique firm. She transitioned to non-profit work, becoming a founding team member of Fair Trade USA in California. Yamile headed the producer services division to assist global producer organizations with higher prices, sustainable growing practices and quality improvement. Since moving to Princeton, Yamile has continued her service through local nonprofits, including as a trustee of the Princeton Public Library and as a Board President of Sustainable Princeton. She is currently presenting the C-Change Conversations Primer to audiences in Spanish.

Nancy Ylvisaker

Nancy worked for 17 years in finance in New York City at JP Morgan and Merrill Lynch as an investment banker and head of both firm's Community Development Corporations. She then spent 8 years heading a non-profit historic cemetery and Level II arboretum. She is currently the board chair for the Nature Conservancy in Missouri and on the board of the Harris World Ecology Center. Nancy holds a MBA from the Yale Business School and is currently completing a post-graduate program at the Yale Center for Business and the Environment.
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