International Society of Arboriculture (ISA), Certified Arborists on Staff
An arborist by definition is an individual who is trained in the art and science of planting, caring for, and maintaining individual trees. ISA arborist certification is a nongovernmental, voluntary process by which individuals can document their base of knowledge. Certified Arborists are individuals who have achieved a level of knowledge in the art and science of tree care through experience and by passing a comprehensive examination developed by some of the nation's leading experts on tree care. Learn more about hiring a Certified Arborist.
Tree Care Industry Association (TCIA)
Established in 1938, the Tree Care Industry Association is a trade association of more than 2,000 commercial tree care firms and affiliated companies. TCIA develops safety and education programs, standards of tree care practice, and management information for arboriculture firms around the world.
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