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Institute for Sustainability (IfS)


120 Wall Street, Fl 23 
New York, NY 10005-4020

Customer Service

100 Mill Plain Rd 3rd Fl
Danbury, CT 06811 

General Inquiries: 800-242-4363
International calls: 203-702-7660
Fax: 203-775-5177

Press Inquiries

If you would like to find out more about IFS, or have a question, please let us know at  We love to hear from you! Or, complete the form and we'll get back to you as soon as possible.

Contact IfS