Certification by the International Society of Arboriculture is an important goal and achievement in the career of anyone who works in or around trees.
Complete information about certification -- including exam dates, location, and costs -- can be found on the ISA website. For a brief summary, scroll down.
The GAA offers review courses combined with a test. Check our upcoming events.
Alternatively, you can order the study guide (electronic version) and look for an upcoming exam. All certification exams are available as computer-based exams. Visit the Pearson VUE site to learn more about testing locations in your area.
The ISA FAQ is also helpful.
Tambíen en Español, Aqui
Also helpful are the application handbooks produced by the ISA.
ISA CREDENTIAL GUIDE (Click to link to correct ISA Page)
The written exam content is divided into 10 areas of knowledge, and the percentage next to each area below reflects the percentage of questions associated with that area. These are subject to change when a new job task analysis is completed for the exam.
The Study Guide is divided into the following Chapter (domains in parenthesis)
-3 years of experience or a 2-yr degree in a related field + 2 yrs of experience or a 4-yr degree + 1 yr of experience
-A letter of recommendation from a former or current employer
-3 Letters of reference (invoices, contracts, etc.)
2 step process: Apply on ISA's website, then enroll for the exam once approved
Cost: $170 for ISA & Chapter members, $280 for ISA non-members
Dates & Deadlines
Paper Exams: You must enroll & pay within at least 12 business days before the date.
Online Exams: Once you submit your application and gain approval, you may schedule your exam up to 90 days in advance. $125 additional fee.
Exam Content & Format
3.5 hour exam, 200 questions
You must pass with a 74% or higher. You may retake the exam within 1 year.
Your certification will be valid for 3 years.
To renew, you can retake the exam or accumulate 30 CEUs (Continuing Education Units)
Cost: $120 for ISA members, $230 for ISA non-members