If a Social Security disability case reaches a hearing, the vocational expert can become one of the most important voices in the room. At Step Five, the judge may look to that expert for testimony about whether work exists in significant numbers in the national economy for someone with the claimant’s limitations, age, education, and work history. The vocational expert is supposed to be impartial, but the way their testimony is framed, challenged, and documented can have a major effect on the record.
In other words, a disability appeal is not always won or lost on medical records alone. It often turns on whether the vocational evidence actually fits the person in front of the judge.
If you’re new to this topic, it may help to start with a broader overview of how job testimony and Step Five disputes work in disability hearings. In this post, you’ll learn six common vocational expert mistakes that can weaken disability appeals, why they matter, and what an attorney may look for when building a stronger record.
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Social Security uses a five-step sequential evaluation process to decide disability claims. At Step Five, the question becomes whether the person can adjust to other work that exists in significant numbers in the national economy. The agency’s regulations explain that work can count even if there is no local opening and even if the claimant would not actually be hired; the focus is on whether jobs exist in significant numbers nationally or in several regions of the country (SSA regulation on work in the national economy).
The Social Security Administration may use vocational experts when issues involving job requirements, transferable skills, or other complex vocational questions come up (SSA regulation on use of vocational experts). SSA’s current vocational expert handbook, updated effective January 6, 2025, describes vocational experts as professionals who provide impartial expert opinion evidence and states that they are expected to cite, explain, and furnish sources supporting their testimony (SSA Vocational Expert Handbook).
That matters because even a seemingly small vocational mistake can affect whether the judge accepts a jobs list, a skills-transfer opinion, or a conclusion that other work exists. SSA policy updated in SSR 24-3p, effective January 6, 2025, also reflects a changing framework for how adjudicators evaluate occupational information and vocational evidence (Federal Register notice for SSR 24-3p). For claimants and families, that often means hearing-level advocacy has become more fact-specific, not less.
One of the most common problems is assuming that if a vocational expert names a few occupations, the analysis is over.
It usually isn’t.
A vocational expert may identify jobs based on a hypothetical question from the judge. But those jobs only matter if the hypothetical truly reflects the claimant’s residual functional capacity, along with the relevant age, education, and work history factors. If the hypothetical leaves out restrictions involving pace, attendance, time off task, reaching, handling, concentration, social functioning, or the need to alternate positions, the job examples may not reflect the claimant’s real situation.
This issue comes up often because vocational testimony is only as reliable as the assumptions underneath it. SSA’s own framework recognizes that vocational evidence is used to address case-specific questions at Steps Four and Five (SSR 24-3p). If the factual assumptions are incomplete, the testimony can become much less persuasive.
In practical terms, this is one reason many claimants focus heavily on medical evidence but spend less time preparing for the job-testimony part of the hearing. A lawyer handling disability hearings may look closely at whether the hypothetical question matched the medical record, symptom testimony, and function reports. That same issue also connects to getting ready for the vocational expert portion of an SSDI or SSI hearing, because preparation often shapes which limitations actually make it into the record.
Another major mistake involves job numbers.
At Step Five, the issue is whether jobs exist in significant numbers in the national economy. SSA’s regulation says the agency looks at whether there are significant numbers in one or more occupations, and it excludes isolated jobs existing in very limited numbers in relatively few locations (20 C.F.R. § 404.1566).
But where do the numbers come from?
That question has become more important over time. The Supreme Court held in Biestek v. Berryhill that a vocational expert’s testimony does not automatically stop counting as “substantial evidence” simply because the expert declines to provide underlying private data. Even so, the Court did not create a rule that all vocational testimony is automatically reliable. Instead, it left the issue to a case-by-case review of the record.