Contact Us

Email us
Phone: +1.678.367.0981
Fax: +1.240.547.1795

Headquarters Address

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

Mailing Address

International Society of Arboriculture
PO Box 191
Annapolis Junction, MD 20701
United States

Who We Are
Who We AreOur OrganizationOur Governance

As an international organization with more than 26,000 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 2023 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:

The value and benefits of trees, as well as the people who care for and about them, are recognized around the world.

  1. Increasing numbers of professionals worldwide who engage in safe, ethical, industry- accepted tree care practices.
    • 1.1 Increasing number of professionals who utilize multiple resources, including peer-reviewed, science-based industry accepted practices, through various technologies to increase their knowledge and skills to manage trees.
    • 1.2 Increasing number of professionals who achieve internationally-recognized standards of competency.
    • 1.3 Increasing the number of people who view arboriculture and urban forestry as a diverse, inclusive, and equitable profession.
  2. Increasing the number of stakeholders who rely on ISA to inform their tree management decisions to improve tree care outcomes.
    • 2.1Components have opportunities to network, collaborate, and exchange information, knowledge, and exemplary practices.
    • 2.2 Partners and allied professionals have access to resources and tools to increase the understanding of professional tree care.
    • 2.3 Increasing the number of stakeholders who use credentialed and competent arborists to manage and care for trees.
  3. Increasing awareness that trees are an integral part of global sustainability solutions.