- Amherst College
- Ayer Industrial Development
- Boston Housing Authority
- Centerville - Osterville - Marstons Mills Water Department
- City of Boston
- City of Brookline
- City of Cambridge
- City of Holyoke
- City of Newton
- City of Taunton
- City of Waltham
- Connecticut Department of Transportation
- Continuous Electron Beam Accelerator
- Concord Public Schools
- Eaglebrook School
- Greenfield Redevelopment Authority
- Harvard University
- Hingham Public Schools
- Land Vest
- Massachusetts Highway Department
- Massachusetts Port Authority
- Massachusetts Institute of Technology
- Massachusetts Department of Environmental Management
- Millers Rivers Community Development Corp.
- Montachusett Regional Planning Commission
- Mount Holyoke College
- Needham Public Schools
- Norfolk Public Schools
- New York Department of Transportation
- Norwell Public Schools
- Sisters of Providence
- Springfield Business Development Corporation
- South Grafton Water District
- Stanford Linear Accelerator Corporation
- Town of Amherst
- Town of Andover
- Town of Arlington
- Town of Athol
- Town of Ayer
- Town of Barnstable
- Town of Barre
- Town of Berkley
- Town of Blackstone
- Town of Braintree
- Town of Charlemont
- Town of Chicopee
- Town of Cohasset
- Town of Concord
- Town of Douglas
- Town of Dudley
- Town of Duxbury
- Town of Franklin
- Town of Freetown
- Town of Grafton
- Town of Montague
- Town of Monson