Florida does not require a license to operate a tree service. Anyone with a chainsaw, a pickup truck, and a willingness to climb can advertise as a 'tree expert' and quote work tomorrow morning. This is the regulatory environment our industry operates in, and it is the single biggest reason for the variability in workmanship our clients encounter when they shop for tree care.
The International Society of Arboriculture (ISA) credential is the de facto professional standard the industry has built in the absence of state licensure. Here is what it actually means.
What the certification requires
ISA Certified Arborist is the entry-level professional credential. Eligibility requires either a four-year degree in arboriculture/forestry/horticulture plus one year of full-time field experience, or three years of full-time field experience without the degree. The exam is 200 questions across ten domains: soil management, identification, installation and establishment, pruning, diagnosis and treatment, urban forestry, tree protection, tree risk assessment, tree biology, and worker safety.
Continuing education is mandatory: 30 CEUs over three years to maintain certification. Lapse and you lose the credential.
Higher-tier credentials
- Tree Risk Assessment Qualification (TRAQ) — required for any formal hazard assessment work; renewable every five years.
- Certified Arborist Municipal Specialist — for arborists working in urban planning and code enforcement contexts.
- Certified Arborist Utility Specialist — for line-clearance and utility-side work.
- Board Certified Master Arborist (BCMA) — the top professional credential; requires Certified Arborist for at least three years, passing a separate exam, and accumulated experience.
Why it matters for the work
The exam content is not theoretical. It tests whether the climber on your property understands branch collar anatomy, dose-response of soil amendments, the biomechanics of co-dominant union failure, the safe load ratings of climbing hardware, and the regulatory framework around pesticide application. These are the things that separate a competent crew from one that will accidentally kill a 60-year-old oak while trying to clean it up for storm season.
What to ask before hiring
- Is the on-site supervisor an ISA-certified arborist? (Not 'someone in the office.' On site.)
- Can I see proof of liability and workers' comp insurance, current dates, for the actual company sending the crew?
- Is the company a member of TCIA (Tree Care Industry Association)? Accreditation is a separate, harder standard.
- What pruning standard do you follow? Correct answer: ANSI A300.
- What is your written warranty?
Any company that hesitates on these questions is telling you something important.