ReqoData
Professional Services 2026Updated

List of Certified Arborist Tree Risk Assessment Firms

Comprehensive directory of ISA-certified arborist firms specializing in tree risk assessment (TRAQ). Includes company credentials, service areas, and contact details for property managers, insurers, and municipalities seeking qualified risk assessors.

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Company Name
Location
ISA Credentials
TRAQ Qualified
Services Offered
Service Area
Phone
Website
Year Established
Specializations
Staff Size
Insurance & Bonding

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Company NameLocationISA CredentialsServices
Davey Tree Expert CompanyKent, OHISA Certified Arborists, BCMATree Risk Assessment, Consulting, Plant Health Care
Bartlett Tree ExpertsStamford, CT14 ISA Certified, 4 BCMATree Risk Assessment, Inventory, Insect & Disease
SavATreeBedford Hills, NYISA TRAQ QualifiedRisk Assessment, Storm Damage Audit, Plant Health Care
Atlas Tree SurgerySanta Rosa, CAISA Certified, TRAQTree Risk Assessment, Arborist Reports, Consulting
Monster Tree ServiceFort Washington, PAISA Certified, TRAQTree Risk Assessment, Removal, Pruning

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Understanding Certified Arborist Tree Risk Assessment Services

Tree risk assessment is a systematic process used to evaluate the likelihood of tree failure and the potential consequences. Firms that employ ISA-certified arborists with the Tree Risk Assessment Qualification (TRAQ) follow standardized methodologies defined in the ISA Best Management Practices for Tree Risk Assessment.

Why TRAQ Certification Matters

The TRAQ credential, administered by the International Society of Arboriculture, ensures arborists have been trained in a consistent, defensible process for evaluating tree risk. This matters because risk assessment reports are often used in:

  • Insurance claims and liability disputes
  • Municipal tree management programs
  • Pre-construction site surveys
  • Post-storm damage evaluation

Industry Landscape

The U.S. arboriculture industry includes approximately 82,000 establishments employing around 160,000 workers, with annual gross receipts near $9 billion. The sector is highly fragmented — the four largest firms account for only 4% of combined industry revenue. Over 30,000 arborists hold ISA certification worldwide, with TRAQ-qualified professionals representing a specialized subset focused on risk assessment.

What a Tree Risk Assessment Includes

Level 1 — Limited Visual Assessment
A walkthrough survey of a population of trees, typically used after storms or for large properties. Identifies obvious hazards without detailed individual inspection.
Level 2 — Basic Assessment
A detailed visual inspection of individual trees, examining structure, crown condition, trunk defects, root zone, and site conditions. This is the most commonly requested assessment level.
Level 3 — Advanced Assessment
Uses specialized equipment such as resistograph drills, sonic tomography, or aerial inspection to quantify internal decay or root defects when Level 2 findings warrant further investigation.

Key Credentials to Look For

CredentialIssuing BodySignificance
ISA Certified ArboristInternational Society of ArboricultureBaseline professional competency in tree care
TRAQISASpecialized training in standardized risk assessment methodology
Board Certified Master Arborist (BCMA)ISAHighest ISA credential — demonstrates advanced knowledge and experience
Registered Consulting Arborist (RCA)American Society of Consulting ArboristsFocused on consulting, expert witness, and written report standards

Frequently Asked Questions

Q.How does ReqoData verify that a firm is actually TRAQ-qualified?

When you request a list, our AI crawls public sources including the ISA credential verification directory, firm websites, and professional profiles to confirm current TRAQ status. Since credentials must be renewed, the data reflects what is publicly verifiable at the time of your request.

Q.Can I filter by assessment level offered (Level 1, 2, or 3)?

Yes. You can specify the assessment level in your request. Firms offering Level 3 advanced assessments typically advertise their specialized equipment capabilities, which our system identifies during data collection.

Q.Does this dataset include firms outside the United States?

ISA certification is international, with chapters across North America, Europe, Asia, and Oceania. You can specify any region in your request, though coverage is densest in the U.S., Canada, Australia, and the UK.

Q.How current is the contact and credential information?

Data is gathered in real time from public web sources when you make your request — it is not pulled from a static database. This means you get the most current publicly available information, though we recommend verifying credentials directly with ISA for high-stakes engagements.

Q.Can I get arborist firms that also provide expert witness testimony?

Yes. Many TRAQ-qualified firms also offer litigation support and expert witness services. Specify this in your request and we will filter for firms that publicly advertise consulting arborist or expert witness capabilities.