Certified Tree Worker Program
Western Chapter International Society of Arboriculture
Western Chapter ISA Certified Tree Workers are individuals who have a minimum of 18 months experience professionally climbing
trees in a safe and efficient manner to perform tree care. They have knowledge in the major aspects involved in tree care including,
tree biology, cabling, planting, pruning and safety. Applicants are required to complete a written knowledge based exam and a practical
skills evaluation which includes knot tying. Skills evaluations are conducted in either climbing or aerial lift operations.
NOTE: THE WESTERN CHAPTER’S CERTIFIED TREE WORKER PROGRAM IS INDEPENDENT OF THE ISA’S CREDENTIAL.
Click here for a complete application packet
Click here for practical skill evaluation for climbing
Click here for practical skill evaluation for aerial lift
Click here for a list of approved knots
Click here to download a CTW Patch Order
Click here to download an Exam Retake Form
Interested in volunteering as a judge? Click here to complete a judge application
International Society of Arboriculture
The Arborist Certification Program is a voluntary effort among professionals in the tree care industry to establish a meaningful standard of quality in arboricultural work, to promote and encourage continuing education, and to provide the public with a mechanism for identifying qualified arborists.
Click here for more information on the program
Click Here to Register Online for an ISA Arborist Exam
Click Here to Find an ISA Certified Arborist in Your Area
Check Your CEU Status On Line New!
Continuing Education Units
How to Apply for Continuing Education Units (CEU's) for Your Upcoming Program
The Western Chapter ISA has taken the responsibility of assigning continuing education hours (CEUs) for educational programs in the states of Arizona, California, Hawaii and Nevada. We would be pleased to assign CEU numbers to programs you present if they are applicable. Offering credit for your programs can make them more attractive to potential attendees and registrations may be increased.
Click here to download an application for continuing education units
Click here to download a blank CEU Sign in Sheet
Regional Species Lists
Species List for Certification examinations within the Western Chapter Species listings are available for the following regions:
California – Southern
California – Central
California – Northern
Nevada – Southern
Nevada – Northern
Click on the region listed above to download the corresponding list.
Upcoming Exam Dates
1/9/2016 - All Levels - Arcadia - All Levels
2/13/2016 - All Levels - Tempe, AZ - All Levels
2/17/2016 - CTW Only - Las Vegas, NV - CTW Only
2/26/2016 - CA Only - Las Vegas, NV - Arborist Only
7/23/2016 - All Levels - Santa Barbara - All Levels
9/17/2016 - CA Only - Prescott, AZ - Arborist Only
11/5/2016 - All Levels - Tempe, AZ - All Levels