OverviewHeadquarters: Atlanta, GAWebsite: isa-arbor.comAreas of Focus: Association / UnionEducationScience / TechnologyInternationalPopulations Served: All Populations About UsMission: Through research, technology, and education, the International Society of Arboriculture (ISA) promotes the professional practice of arboriculture and fosters a greater worldwide awareness of the benefits of trees. industry: Nonprofit