A certified arborist is tree care specialists who fully understand the needs of trees, trained to provide complete plant health care for your trees and shrubs. They are trained and knowledgeable in all aspects of arboriculture. ISA Certified Arborist have met all requirements to be eligible for the exam, which includes three or more years of full-time, eligible, practical work experience in arboriculture and/or a degree in the field of arboriculture, horticulture, landscape architecture, or forestry from a regionally accredited educational institute. This certification covers a large number of topics giving the candidates flexibility in the arboricultural profession. A code of ethics for ISA Certified Arborists strengthens the credibility and reliability of the work force. This certification is accredited by the American National Standards Institute, meeting and exceeding ISO 17024. Johnson's Tree Care Inc is certified arborist accredited by International Society of Arboriculture (ISA), identified throughout the bay area as qualified, knowledgeable tree care professionals.