Established by the Wetlands and Waterways Program, Circuit Riders promote fair, consistent and environmentally sound wetland permitting by the 351 local conservation commissions in the state. Circuit Riders accomplish these goals by offering technical, administrative, and regulatory assistance on numerous wetland topics to hundreds of commissions, municipal boards, and consultants each year. In 2011 the Program and its Circuit Riders were honored with the prestigious Massachusetts Association of Conservation Commission’s Environmental Service Award for the exemplary work that they do.

Commissions should look here for upcoming training opportunities. Any other questions should be directed to your regional Circuit Rider or Nancy Lin (see below). 

Regional Circuit Riders
Upcoming Workshops

Get to Know Your Regional Circuit Rider

photo of Nancy Lin

Nancy Lin is the Wetland Circuit Rider Coordinator and created the Circuit Rider Program in 1995. Since 1988 Nancy has overseen the outreach and training for MassDEP's Wetlands and Waterways Program, as well as writing and managing grants that forward wetlands/waterways programmatic goals. As a certified Professional Wetlands Scientist (PWS), Nancy has developed, produced and implemented many of the Program's technical, regulatory and general outreach/training efforts. Prior to MassDEP, Nancy was the Director of the City of Cambridge's Conservation Commission; managed natural history and staff training for the New York City Park Ranger program; and was a naturalist/teacher at a NYC Environmental Education Landmark - High Rock Park Conservation Center. Nancy responds to overall Circuit Rider inquiries and can answer technical and regulatory questions from commissions for MassDEP's Southeast Region when the regional circuit rider cannot be reached. She can be reached at 617-556-1109 or

photo of Mark Stinson

Mark Stinson is a Circuit Rider for the Western Regional Office. Mark holds a Bachelor of Science degree from the Massachusetts Maritime Academy and has also taken Masters level courses in Forestry Management at the University of Massachusetts in Amherst. He has over 13 years of experience at the conservation commission level as a commissioner, chair and agent for a Western Massachusetts community. Mark can be reached at 413-755-2257 or


Judy Schmitz, CERO Wetlands Circuit Rider

Judith Schmitz is the Circuit Rider for the Central Regional Office. Prior to working at MassDEP, Judy was the Conservation Agent for the Town of Middleton for three years. She also served for 12 years as a conservation commissioner for the town of Barre, including four years as their chair. Judy holds a B.S. in Civil Engineering with a concentration in Environmental Engineering from Duke University. She has taken graduate courses in botany, environmental science, and wildlife habitat. Judy has had extensive experience consulting for municipalities and applicants, and is knowledgeable in numerous wetland related topics including: wetlands delineation, wetlands replication & restoration, wildlife habitat analysis, pollution impact assessment, stormwater management & hydrology, erosion control monitoring, river determination, and vernal pool studies. She is also a certified Professional Wetland Scientist (PWS) from the Society of Wetland Scientists. In addition to her duties as the wetland circuit rider, Judy will also provide support to the wetlands program as the Wetland Data Manager. Reach Judy at 508-767-2722 or

Northeast Regional Office wetlands technical questions can be directed to the MassDEP NERO Help Line at: 978-694-3405.


  Wetland Circuit Rider Program 2016 Accomplishments in Review  pdf format of Circuit Rider Program 2016 Accomplishments
file size 1MB


Upcoming Workshops

Check back for future events.