Start with the L-1B eligibility and application overview
Turn a performance rating into a supported knowledge account
Select a work example explaining why the employee’s capability matters to the US assignment. Special knowledge of company products or other interests and international application, or advanced knowledge of company processes and procedures, can meet the standard; the knowledge need not be unique or proprietary. Praise for reliability or customer satisfaction should remain context rather than be presented as the entire specialized-knowledge claim.
Identify what the supervisor can establish firsthand
Separate observed work from assumptions and explain the applicant’s individual contribution. A formal training certificate is not universally required, but neither is a favorable review conclusive. Establish the actual qualifying relationship and continuous full-time foreign year within the relevant three years. Exclude US days from that calculation, recognizing that qualifying brief visits do not themselves interrupt continuity. Do not apply the newest performance description to a different earlier role without explanation.
Assess supervision in the proposed assignment
If the employee will work primarily at an unaffiliated employer’s site, the placement is barred when that employer principally controls and supervises the person. A separate prohibition concerns essentially labour for hire rather than a placement tied to the petitioner’s product or service requiring specialized knowledge specific to that petitioner. A customer’s exceptional rating cannot replace evidence about who directs the work or what knowledge the placement requires.
Check the employer’s capacity independently of the rating
The qualifying group must conduct regular, systematic and continuous business in the US and another country. US doing business of less than one year requires new-office treatment: sufficient premises, financial ability to pay the employee and begin business, and an initial approval no longer than one year. Match the proposed resources to the actual assignment. A strong employee appraisal establishes none of those company facts by itself.
Show the employee’s knowledge rather than the department’s history
Describe the organization's particular product, process, service, methodology, data environment, equipment, or business procedure and the employee's developed familiarity with it. Set out the quality and documentation system in plain language: the internal procedures for task cards, the release process, the audit trail the organization maintains beyond regulatory minimums, and the internal training program. Procedure qualification records, weld maps, revision histories naming the author, internal training material, and job files showing where a procedure was developed and first applied are the substance of this classification. What is proprietary, unusual or internally developed here — a validated cleaning cycle, a custom control sequence, a supplier specification, a recipe tolerance, a records system built in-house? The arrangement must not be essentially the provision of labour for hire, and the petitioner must retain control over the beneficiary's work — supervision, direction, and responsibility for the deliverable. The answer should acknowledge that measurement techniques and statistical methods are taught generally, then explain what is company-specific: the fixture designs, the sequencing that suits the company’s particular machines, the acceptance rules negotiated with named customers, and the tribal knowledge captured in the revision notes. What may belong to the employer is everything built around it: the specific configuration, the recipes and tolerances programmed into it, the changeover procedures developed in-house, the validation history, the integration with upstream and downstream equipment. The governing contract can settle whether the petitioning company remains responsible for specialized work rather than supplying ordinary labour.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.