Executive Director

Patrick Herron joined MyRWA as the Water Quality Monitoring Director in 2009 and became Deputy Director in 2014. In September 2016, Patrick took on the role of Executive Director. During his tenure with the organization, Patrick worked with staff to initiate many new programs for the association including the water chestnut removal program, river herring monitoring, Mystic Greenways and phosphorus TMDL. During his time at the association, he has written and managed many of the grants that have underpinned this work and established collaborations across the watershed. He serves as co-chair of the EPA Mystic Water Quality Science Subcommittee and was awarded the EPA Merit Award in 2012.  Prior to joining MyRWA, Patrick completed a doctorate in plant ecology at the University of Connecticut in 2007 and held postdoctoral positions at Woods Hole Marine Biological Laboratory and the Rowland Institute at Harvard University. Outside of work, he chases his children in and out of the water at Shannon Beach and Spy Pond among other places.


Deputy Director

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Julie Wormser joined MyRWA as its Deputy Director in July 2018 and leads its Climate Resilience program.  Prior to joining MyRWA, she ran a consulting business and was a senior policy director at a variety of non-profit organizations including Boston Harbor Now,  Environmental Defense Fund, Appalachian Mountain Club, and The Wilderness Society.  As Executive Director of The Boston Harbor Association, Julie was instrumental in drawing attention to Boston's need to prepare for coastal flooding from extreme storms and sea level rise.  She coauthored Preparing for the Rising Tide and Designing With Water, and co-led the Boston Living with Water international design competition with the City of Boston and Boston Society of Architects.  Julie holds a BA in biology from Swarthmore College and an MPA from Harvard University’s Kennedy School of Government.  She lives in the Mystic watershed with her husband, daughter, well-behaved chickens and misunderstood cats.

Development AND Communications Director

Michelle Liebetreu joined the Mystic River Watershed Association as its first ever fundraising staff in 2016. She has been raising funds and awareness for environmental not-for-profits for the last 12 years—including at the Cloud Forest School in Monteverde, Costa Rica and the Alliance for the Great Lakes in Chicago, IL. A resident of Somerville, she is excited to help her local watershed.  A graduate of DePauw University in Biology and Psychology, she enjoys swimming in Mystic Lakes, as well as running along the river. 



Amber Christoffersen joined the Mystic River Watershed Association in May of 2016. She is a designer and planner who has worked on active transportation, open space and affordable housing projects in the Boston area and around the country. She is leading the participatory planning process for dozens of path and park projects across the watershed. She holds a Master’s Degree in Landscape Architecture from the University of Georgia and a Bachelor’s Degree in Economics from the College of William and Mary. As an avid long distance runner, she is constantly exploring the region's many waterfronts and parklands, looking for opportunities to make them more beautiful and accessible. 




Andy Hrycyna joined MyRWA in April 2014. Andy comes to MyRWA from the Sustainability and Environmental Management Program at Harvard Extension School, where he received a master’s in ecological management.  Andy discovered a passion for ecology and environmental protection mid-career, after many years in non-profit book publishing. He now leads MyRWA's water quality monitoring program and restoration efforts across the watershed. He enjoys biking and kayaking with his wife and two daughters. Andy is a passionate birder (unlike his wife and kids). Send bird-related watershed news his way!  


communications AND oUTREACH Manager


Erica Wood joined MyRWA in January of 2018. Erica hails from Atlanta, GA and has made her way up the East Coast working on various community development and sustainability projects. Most recently, she led community engagement and advocacy work at a food access and environmental non-profit in North Central Massachusetts. Erica studied sustainable global development and community food systems at Virginia Tech. When she’s not working, you will find Erica gardening, exploring Boston, or embarking on outdoor adventures with friends and family. 





Marian Miller joined Mystic River Watershed Association as a volunteer in the fall of 2017.  A life-long educator, she brings a passion for sharing knowledge, creating interesting, interactive STEM content for audiences of all ages, and helping people understand ecological issues that impact their own communities.  Marian holds a Masters in Education from Tufts University.   A city lover, supporter of parks – tiny and grand, outdoor enthusiast, wildlife watcher, hiker, long-haul walker, and adventurer – the world is an amazing place – eyes open! An avid fan of water all its forms, Marian is excited to make the Mystic the focus of her work!



Stormwater Project manager

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Catherine Pedemonti joined the Mystic River Watershed Association in April of 2018. With a Masters of Science in Ecological Design from the Conway School of Landscape Design, Catherine has worked for a variety of organizations dedicated to the stewardship of our public lands, including the Emerald Necklace Conservancy, Friends of Fresh Pond Reservation, and Mass Audubon's Drumlin Farm. A resident of West Medford, Catherine enjoys spending time walking, biking, and canoeing along the Mystic with her wife, two kids, and puppy.



Office Manager

Kimberly Provo is a resident of Woburn and has lived in the Mystic River Watershed most of her life. She has an Accounting degree from Newbury College. She is currently the Office Manager and has been with MyRWA since 2006. She has had varied professional experiences including an assistant Montessori Elementary teacher at the Stoneybrook Montessori School in North Chelmsford as well as a Human Resource Representative for UPS in Chelmsford for 6 years. She enjoys gardening and spending time with her family.



Terracorps (americorps) member

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Zoe Davis joined MyRWA as the Landscape Stewardship Coordinator TerraCorps Member in August 2018.   Zoe is from Berkshire County, Massachusetts and moved to the North Shore to study at Gordon College.  She holds a Bachelor of Science in biology, concentrating in environmental science and has been involved in environmental education and research.  Recently, Zoe has worked with the Nicholas School of the Environment at Duke University, conducting an ongoing forest development and climate change study.  When she is not working, Zoe enjoys baking quick breads and playing her guitar. 

Photo Credit: David Mussina 2018

Photo Credit: David Mussina 2018