Our Team


Treat headshot

Natalie Hildt Treat became Executive Director of the C-10 Foundation in February 2017. Natalie previously served on C-10’s board of directors, and has a long history of work in environmental and energy issues, public policy and communications. She is honored to succeed long-time Executive Director Sandra Gavutis and Research Director Debbie Grinnell, and looks forward to growing C-10’s membership, diversifying funding and expanding our monitoring network.

Natalie holds a B.A. in Environment and Public Policy from Connecticut College and an M.A. in Communications Management from Emerson College. She lives in an energy-efficient, solar-powered home with her husband Tom and daughter Julia. You can reach Natalie at natalie@c-10.org or connect on LinkedIn.


Mike Mansir is System Administrator for the Citizen’s Radiological Monitoring Network operated by the C-10 Foundation. Mike’s technical background as a software engineer and network administrator makes him invaluable in running the network, which operates on proprietary software with a central station and field sites spread across the Emergency Planning Zone. Mike ensures minimal system downtime by continuously monitoring the uploading of real-time data and overseeing the installation and maintenance of field equipment.

You can reach Mike at mike@c-10.org.

Board of Directors


As a small non-profit, our working board is our lifeblood. We are grateful to the following individuals for serving with us:

Pat Skibbee, Board Chair

Diane Teed, Treasurer

Jack Van Loan, Recorder

Natalie Hildt Treat, Executive Director

Sandara Gavutis, Emeritus Executive Director

Debbie Grinnell, Emeritus Research Director

Erika Didrikson

Sarah Doenmez

Christopher Nord