What is a Certified Arborist? First of all, an arborist by definition is a specialist trained in the art and science of planting, caring for and maintaining individual trees. They are knowledgeable about the needs of trees and are equipped to provide the proper care, safely and professionally. Certified Arborists go further in their dedication to excellence in the field of Arboriculture. Besides maintaining high standards of practice, they have also achieved a higher level of knowledge in the art and science of tree care by passing an official comprehensive examination developed by some of the country's leading experts on tree care. Certified arborists must maintain their certification through continued education documented by the New York State Arborists Association, and renew their certification every 3 years. They must keep abreast of new technology, by attending seminars and reviewing the latest publications. When hiring a tree company please keep in mind that proper tree care is an investment which can yield substantial returns. Choosing a company that employs certified arborists such as Neal's Tree Experts would be a very prudent choice.