Contact Information

The International Tree Climbing Championship Committees and the World Championship are managed by the International Society of Arboriculture (ISA). If you have any questions, please feel free to contact our office by email at or by phone at +1.217.355.9411. We look forward to the opportunity to help answer your questions.

For more information on the ISA visit our website.

Mailing Address

International Society of Arboriculture
Attn: ITCC
P.O. Box 191
Annapolis Junction, MD 20701
United States

Physical Address

International Society of Arboriculture
270 Peachtree Street, NW
Suite 1900
Atlanta, Georgia 30303
United States

Phone and FAX Numbers

Toll Free: 888.472.8733
Phone: +1.217.355.9411
FAX: +1.217.355.9516

Hours of business

The ISA office is open from 8a.m. to 5 p.m. Monday through Friday. The headquarters is located in Atlanta, GA, United States and is in the Eastern Time Zone.

©International Society of Arboriculture 2009-2024
270 Peachtree Street NW, Suite 1900, Atlanta, Georgia 30303 • +1.678.367.0981

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