An arborist is a specialist trained in the art and science of planting, caring for, and maintaining all species of trees. Arborists are knowledgeable about the needs of trees and are trained and equipped to provide proper care. Properly maintained trees are attractive and can add considerable value to your property. Poorly maintained trees can be a significant liability. Pruning or removing trees, especially large trees, can be dangerous work. Thus, a professional should be hired to complete the project safely. Only those properly trained and equipped to work safely in trees should be considered.

Certified Arborists are specialists that have achieved a recognized professional level of knowledge in the art and science of tree care and have passed a comprehensive examination developed by the nation’s leading experts in the industry. Certified Arborists must also continue their education to maintain their certification and adhere to a stringent Code of Ethics. Certification is the process through which professionals can measure the knowledge and the competence required to provide proper tree care.

It is important to check for ISA arborist certification. Certified Arborists are experienced professionals who have passed an extensive exam covering all aspects of tree care. To maintain certification, arborists must earn Continued Education Units by completing exams, attending professional seminars, or donating their services to affiliated organizations. Check for membership in professional organizations such as the International Society of Arboriculture, Tree Care Industry Association, and the American Society of Consulting Arborists. Such membership demonstrates a commitment on the part of the arborist to stay current on techniques and safety information.

Contractors are required to pass both a law and trade exam to become licensed in the state of California. They are also required to carry a State Bond, and Workers Compensation and Liability Insurance. They must be legal citizens of the United States and have passed a thorough criminal background check. To maintain a current standing license, all of the required bonds and insurances must be up-to-date. For your protection, only hire licensed contractors! It is important to verify the status of a contractor's license with the Contractors State License Board.