AI Regulation Tracker / Employment and hiring
Federal Court Holds the Age Discrimination Act Covers AI Hiring Screens for Applicants
In Mobley v. Workday, Judge Rita Lin of the Northern District of California rejected Workday's argument that the ADEA does not protect job applicants, clearing the way for a nationwide collective over AI-driven hiring screens to proceed. The ruling came the day before the opt-in deadline.
This is the case that HR and legal have been circling for two years, because it is the one that answers a question every company using automated hiring tools has quietly been asking: if the software screens people out, and the pattern falls on a protected group, who is on the hook? Mobley v. Workday keeps narrowing toward that answer, and the March 6, 2026 ruling closed one of the last doors Workday had left. Judge Rita Lin in the Northern District of California rejected the argument that the Age Discrimination in Employment Act does not protect job applicants at all. She issued it, tellingly, the day before the collective's opt-in deadline, and the effect was to let a nationwide group of older applicants press their claims rather than have the theory thrown out.
Strip away the procedure and the holding is simple. The ADEA reaches applicants, not just people already on the payroll, and applicants can bring disparate-impact claims when a facially neutral screen falls harder on those aged 40 and older. As the reporting on the ruling put it, the court found that "there are lots of cases, regulations, and courts that have determined that job applicants can bring disparate impact cases for age discrimination," and that reading a gap into the statute would "undermine the whole point of discrimination law." Workday had leaned on the Supreme Court's retreat from Chevron deference to argue the older applicant-coverage reading was now vulnerable. Judge Lin was unpersuaded, holding that the change did not disturb the settled understanding.
Why does this matter beyond one company?
Because Workday is not a small employer with a homegrown script. It is one of the systems a large share of the corporate world uses to receive, sort, and screen applications. A ruling that the ADEA reaches automated screening, and that applicants can sue over disparate impact, is not really about Workday. It is about every employer whose hiring funnel runs through an algorithm that ranks, filters, or scores candidates. The case is proceeding on the theory that an AI tool sitting between applicant and employer does not insulate anyone from discrimination law. It channels the exposure, it does not erase it.
Read the status precisely: this is not a final judgment
Be exact about the ceiling, because it is easy to overstate. Judge Lin did not rule that Workday's tools discriminate, and she did not find anyone liable. What she did was reject a legal argument that would have ended the applicants' theory, and allow the collective to move into discovery. It is a binding ruling in the case, and it settles the applicant-coverage question for this litigation, but it is a district court decision, not a Ninth Circuit or Supreme Court holding, and the merits are still ahead. Anyone telling you the courts have declared AI hiring illegal is wrong. What is true, and what matters, is that the door to a nationwide age-bias collective over automated screening is open, and the plaintiffs get to build their case.
What should HR and executives do now?
Treat this as the signal to get your hiring technology documented before you are asked to explain it under oath. Know exactly what your screening tools do: what they rank on, what data they were trained or tuned on, and whether anyone has tested their output for disparate impact by age and other protected characteristics. If a vendor supplies the tool, do not assume their contract shifts the risk off you. The whole thrust of this litigation is that the employer using the screen stays exposed. Run bias testing and keep the records. Preserve the ability to explain, in plain terms, why a given candidate was advanced or rejected. And align this with the direction federal enforcement is heading on algorithmic hiring, because the litigation risk and the enforcement risk are now pointing the same way. None of this requires abandoning automated hiring. It requires being able to defend it.
Questions professionals are asking
What did the court actually decide?
Judge Rita Lin rejected Workday's argument that the Age Discrimination in Employment Act does not protect job applicants. She held that applicants can bring disparate-impact age claims and that the Supreme Court's move away from Chevron deference did not disturb that reading. The ruling let the nationwide collective over AI hiring screens proceed.
Does this mean AI hiring tools are illegal?
No. The court did not find that Workday's tools discriminate or hold anyone liable. It rejected a legal argument that would have ended the applicants' theory and allowed the case to move into discovery. The merits are still ahead. What it establishes for this litigation is that applicants can sue under the ADEA over automated screening.
Does using a vendor's tool shift the risk off the employer?
Do not assume so. The theory driving this case is that an AI tool between applicant and employer channels liability rather than removing it, and that the employer using the screen stays exposed. Review vendor contracts, but plan on retaining responsibility for how the tool affects protected groups.
What should HR do about existing screening tools?
Document what each tool ranks on and what data it uses, test its output for disparate impact by age and other protected characteristics, and keep the records. Preserve the ability to explain in plain terms why candidates were advanced or rejected, and align this with federal enforcement direction on algorithmic hiring. The goal is to be able to defend automated hiring, not to abandon it.
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Informational analysis for working professionals, not legal advice. Confirm how any ruling or duty applies to your situation with qualified employment counsel in the relevant jurisdiction.