Vocational Expert Testimony Under Daubert and Kumho: What Attorneys Should Look For

By Allan S. Billehus, MS, EdS, CRC, LPC
Forensic Vocational Expert · SouthEast Vocational Experts · Updated November 8, 2026

Vocational opinions sit at the center of damages in personal injury, wrongful death, medical malpractice, and employment cases. Economists build lost-earnings calculations on the vocational expert’s conclusions about pre-injury and post-injury earning capacity. If the vocational foundation is weak, everything built on it is exposed.

From Frye to Daubert

Before 1993, many courts admitted expert testimony under the Frye “general acceptance” test. In Daubert, the U.S. Supreme Court held that the Federal Rules of Evidence superseded Frye and that judges must ensure expert testimony is both relevant and reliable. Courts applying Daubert commonly weigh:

1. whether the expert’s theory or method can be, and has been, tested;
2. whether it has been subjected to peer review or publication;
3. its known or potential error rate;
4. the existence and maintenance of standards controlling its operation; and
5. whether it is generally accepted in the relevant professional community.

Why Kumho Tire matters for vocational experts

Vocational experts rarely run laboratory experiments. Their opinions draw on clinical interviews, standardized testing, occupational data, transferable skills analysis, and labor market research. Kumho Tire confirmed that the gatekeeping duty covers this kind of specialized, experience-based testimony, and that the Daubert factors are applied flexibly to fit the discipline. The question is whether the expert used the same intellectual rigor in the courtroom that characterizes practice in the field.

What the 2023 amendment to Rule 702 changed

Rule 702 now provides that a qualified expert may testify if the proponent demonstrates that it is more likely than not that: (a) the expert’s specialized knowledge will help the trier of fact; (b) the testimony is based on sufficient facts or data; (c) it is the product of reliable principles and methods; and (d) the opinion reflects a reliable application of those principles and methods to the facts of the case. The Advisory Committee explained the amendment was intended to clarify that these are admissibility questions for the court under the preponderance standard — not merely questions of weight for the jury.

Florida and Georgia

In 2019, the Florida Supreme Court adopted the Legislature’s Daubert amendments to section 90.702 of the Florida Evidence Code. Georgia applies the Daubert standard in civil cases under O.C.G.A. § 24-7-702. Because state rules and case types vary, confirm the governing standard for your venue.

What does a defensible vocational methodology look like?

• Complete records review — medical, psychological, educational, employment, and earnings records, with an explanation of anything the expert did not review.
• A documented interview — work history, education, skills, limitations, and pre-injury career trajectory.
• Testing that is reliable and valid — instruments that measure what they claim to measure, administered and interpreted appropriately.
• Transferable skills analysis tied to the individual’s documented residual functional capacity.
• Labor market evidence — current, geographically appropriate job and wage data rather than assumptions.
• Consistency — the expert actually followed the methodology the report describes.

Questions to ask about any vocational expert report

• What are the expert’s credentials, and are the opinions within that expertise?
• Which records were reviewed — and which material facts were omitted?
• Which tests were administered, and are they appropriate for this individual?
• Were transferable skills identified, and is the analysis consistent with the medical restrictions?
• What is the source, date, and geography of the labor market and wage data?
• If opinions answer hypothetical questions, are the hypothetical’s assumptions supported by independently admissible evidence?

Job-matching software and reliability

Many vocational experts use trait-factor job-matching software that compares a worker profile with occupational data to produce job titles, transferable skills, and expected wages. These tools can be useful, but under Daubert their reliability, validity, and known error should be understood — and the expert must explain how the outputs were checked against the individual’s actual restrictions and local labor market.

When a file consultation makes sense

Not every case needs expert witness testimony. A vocational file consultation — a review of the case file or of the opposing expert’s report — can identify methodology gaps, omitted records, and unsupported assumptions in time to shape discovery and deposition strategy. See our forensic vocational services.

This article is general information about vocational evaluation, not legal advice. For advice about a specific claim or case, consult a VA-accredited representative or a licensed attorney.