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ISA Annual Conference and Trade Show 2019 - International Society of Arboriculture

Knoxville Expo Center, Knoxville, Tennessee
Aug 09 - Aug 11, 2019


Annual Conference

The ISA Annual International Conference and Trade Show provides a forum for the exchange of information and opportunities to network with others in the arboricultural profession.

Who We Are

Our Organization

ISA exists so that professionals, allied professionals, public officials, and consumers worldwide recognize the economic, environmental, and societal benefits and values of trees and their care at a cost that demonstrates the wise stewardship of resources. We are registered in the State of Illinois as a 501c (5) nonprofit organization.

The following guiding principles provide a framework for our objectives and inspire us to advance ISA’s mission and communicate our philosophy to our diverse audiences. These guiding principles steer our organization and support our vision as we advance ISA's mission.

Our Services


An ISA membership is an investment in your industry and your career. With over 24,000 members throughout the world, ISA is the largest professional association of those dedicated to the practice and study of tree care.

Our Leaders

Our team of more than 40 dedicated and diverse staff from a variety of backgrounds is here to serve you.

ISA Public Outreach
The International Society of Arboriculture manages, an educational website that provides the public with quality tree care information. helps increase awareness of the benefits of trees and provides homeowners and other tree owners with access to resources to help sustain trees in an urban environment.

Climbing Competitions

Professional tree climbing competitions are held around the world to provide a platform for arborists to learn about the latest in climbing techniques and innovations in equipment.

Scientific Symposia

Scientific Symposia are premier events for members of the arboriculture community. These events are hosted around the world and are a great opportunity to meet industry professionals and learn about the latest research in the field.

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