ISA (International Society of Arboriculture)

The International Society of Arboriculture (ISA) is a professional organization dedicated to promoting the health, safety, and sustainability of trees and wooded landscapes. It provides education, certification, and resources for arborists—experts who care for and manage trees. The ISA sets standards for tree care practices, advances research, and supports industry professionals worldwide. Its goal is to ensure trees are properly maintained, contributing to environmental health, safety, and aesthetic value in communities and urban areas.