What we hold — and
why it matters to counsel.

Why this matters to counsel: Under Daubert / Kelly-Frye, expert qualifications must be demonstrated by more than self-professed expertise — the expert's credentials must be verifiable and the foundation for opinions must be traceable to established standards. ISA certification is the baseline qualification for admissibility of arborist opinions in California Superior Courts and federal court. The cert number (#WE-12351AU) is included in all expert disclosures and reports per California court requirements and is verifiable at treesaregood.org. FRCP 26(a)(2)(B)(i) and CCP 2034.220(b) both require statement of all relevant credentials — ISA cert number is the starting point.

Why this matters to counsel: In construction-impact cases, encroachment disputes, and utility-line failure claims, opposing counsel will ask whether the expert has specific familiarity with the intersection of tree management and infrastructure. The Utility Specialist credential demonstrates that specificity. It is particularly relevant in cases involving: construction near overhead utilities, tree root intrusion into infrastructure, pruning specification for line clearance, and vegetation management compliance with CPUC and OSHA standards. Under FRCP 26(a)(2)(B)(i), this credential is disclosed as a specialized qualification bearing directly on the subject matter of the opinion.

Why this matters to counsel: TRAQ is the credential required to perform and sign structured tree risk assessments under ISA methodology — it is distinct from the base ISA Certified Arborist certification and cannot be substituted for it. Under Daubert / Kelly-Frye, an expert opinion must be grounded in a reliable methodology. The ISA TRAQ two-step process — assigning likelihood-of-failure and likelihood-of-impact ratings, producing a risk rating (Low / Moderate / High / Extreme) via the published ISA risk matrix — is a structured, peer-reviewed methodology. Courts have accepted ISA TRAQ-based opinions in tree failure, construction damage, and boundary tree disputes. The TRAQ qualification also satisfies CCP 2034.220(b) requirements for professional qualifications disclosure. All risk assessments and litigation-support reports are conducted and signed under TRAQ Level 2 methodology.

Why this matters to counsel: Where a claim involves allegations of inadequate safety measures, failure to maintain site safety, or a tree care company's deviation from accepted safety protocols, the CTSP credential provides a basis for opinion testimony on the applicable safety standard of care. The credential is issued by ISA following examination and is disclosed in expert designations under FRCP 26(a)(2)(B)(i) and CCP 2034.220(b) as a professional qualification relevant to the subject matter of testimony.

Why this matters to counsel: Where herbicide or pesticide application — or failure to apply — is cited as a contributing factor in tree failure or property damage, the QAL is the credential that establishes qualifications to opine on the standard of care for pesticide use in California. The QAL is issued by the California Department of Pesticide Regulation following examination and is disclosed in expert designations under FRCP 26(a)(2)(B)(i) and CCP 2034.220(b). It is particularly relevant in: tree death claims involving herbicide exposure, failure-to-warn claims related to chemical treatment, and cases where the standard of care for vegetation management is at issue.

Why this matters to counsel: The ASCA RCA is the industry's highest credential for consulting arborists and is the appropriate credential for complex litigation support engagements. It is disclosed here with accurate status — candidacy in progress — per the requirement under Daubert / Kelly-Frye and CCP 2034.220 that credentials be stated as they actually are, not as they will be. Credentials in progress must not be claimed in any expert disclosure or report. CanopyMetrics will update this page and the expert disclosure credential statement when the credential is conferred.

An opinion that says "the tree was hazardous" is vulnerable. An opinion that says "the tree exhibited a Probability of Failure rating of High under ISA TRAQ Level 2 assessment, based on documented basal decay with fungal conks present, and a Likelihood of Impact rating of High given target proximity — resulting in an Overall Risk Rating of Extreme under the ISA risk matrix — is defensible." The difference is cite-able, peer-reviewed standards versus unsupported professional assertion.

Every report produced by CanopyMetrics for litigation or expert witness purposes cites: ISA TRAQ methodology (published, peer-reviewed); ANSI A300 tree care standards; CTLA Guide for Plant Appraisal for tree value calculations; and the specific jurisdiction's tree ordinances where applicable. This is what satisfies Daubert / Kelly-Frye scrutiny, and what allows testimony to survive cross-examination.

The credentials on this page are not decorative — they are the demonstration that the expert has been evaluated by established professional bodies against specific competency standards, and that the methodology applied in any given case is the published standard of the credentialing organization, not a private framework. See the full methodology section on the litigation support page.