Who We Are

ISA Governance Structure

ISA Annual Report
Read or download our Annual Report.

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.

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.

Download a PDF of the ISA By-laws.

ISA’s Organizational Focus

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 worth that demonstrates the wise stewardship of resources.

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

  1. To provide the tools to increase the number of professionals who properly and safely care for trees. To achieve this, ISA:
    • Encourages professionals to take advantage of available opportunities for increasing their tree care knowledge and skills to maintain trees properly and safely.
    • Ensures that professionals have access to peer-reviewed, science-based best practices.
    • Offers and maintains an extensive, global credentialing program to increase the numbers of professionals who achieve an internationally-recognized standard of competency.
  2. To ensure that ISA entities have the resources and tools necessary to provide services to local arborists, influence local decision-makers, and facilitate the public exchange of information. In this effort, ISA provides ISA entities a forum for networking, collaboration, and exchange of information, knowledge, and exemplary practices.
  3. To increase the numbers of consumers, public officials, and allied professionals who seek credentialed arborists to maintain trees