Who We Are

As an international organization with more than 24,000 members around the world, ISA adheres to a governance structure that provides the support, organization and adaptability required to meet organizational and chapter needs. We encourage you to take a few moments to learn more about the bylaws, policies and procedures that govern ISA.

Read the 2019-2020 Annual Report

ISA is governed by a set of by-laws that provide a solid foundation from which a large, international organization can best serve its diverse membership and credential holders. We encourage all members to view the by-laws. Any ISA chapter is welcome to use the ISA corporate by-laws as the basis to establish supporting policies and procedures at the chapter level.

View the ISA Bylaws

ISA’s Organizational Focus

ISA exists so that Professionals, allied professionals, decision-makers, and consumers worldwide recognize the economic, environmental and societal benefits and values of trees and their care at a worth that demonstrates the wise stewardship of resources.

The organization’s focus is supported by the following objectives:

  1. Increasing numbers of professionals worldwide engage in safe and proper tree care
    • Professionals take advantage of available opportunities, technology, and resources, including peer-reviewed, science-based best practices, to increase their knowledge and skills to maintain trees properly and safely.
    • Increasing numbers of professionals achieve an internationally recognized standard of competency.
    • Increasing numbers of people view arboriculture and urban forestry as a diverse and inclusive profession worth considering as a career.
  2. Partners, components and allied professions have the resources and tools necessary to provide services to arborists, influence decision-makers, and facilitate the public exchange of information.
    • Components have forums for networking, collaboration and exchange of information, knowledge and exemplary practices.
  3. Increasing numbers of consumers, public agencies, decision-makers, and allied professionals use credentialed and competent arborists to manage trees.