IN THIS GUIDE · Specialised knowledge that would be exercised almost entirely on other companies' shipyard floors
Start with the L-1B eligibility and application overview
Specialised knowledge is knowledge of this company, not of the discipline
The category reaches a beneficiary with special knowledge of the petitioning organisation's product, service, research, equipment, techniques, management or other interests and their application in international markets, or an advanced level of knowledge of its processes and procedures. The emphasis falls on the organisation's own things. Being an unusually capable marine controls engineer is not enough, however scarce that skill is in the labour market, because the scarcity is in the discipline rather than in the company. What helps Félix is that the platform is proprietary: its fault-tolerance logic, its failure modes, its commissioning sequence and its diagnostic tooling exist only inside his employer, and knowledge of them was acquired there over years.
The offsite placement rule is the live issue in this petition
Where a specialised-knowledge beneficiary will be stationed primarily at a worksite other than the petitioner's, two conditions must hold. The work must be controlled and supervised by the petitioning employer rather than by the third party, and the placement must not be essentially an arrangement to provide labour for hire. A shipyard that buys a retrofit service, defined by deliverables the subsidiary owes, sits on the right side of that line. A shipyard that tells Félix which berth to attend each morning and folds him into its own crew does not, whatever the contract says. The distinction is proved with documents and behaviour together, and the behaviour is what changes after month three.
The year abroad, the relationship, and the five-year ceiling
The same threshold conditions apply as for a managerial transfer: one continuous year of qualifying employment with the organisation outside the United States within the three years before filing, a parent, branch, subsidiary or affiliate relationship between the two entities, and both of them actively doing business. Félix's six unbroken years in Richmond County answer the first comfortably. What differs is the ceiling. Maximum stay in L-1B status is five years, against seven for L-1A, and time already spent in the United States for the group counts toward it. A three-year assignment followed by an extension therefore consumes most of the allowance, which is a reason to think about what comes afterwards before it starts.
What the retrofit contracts have to say for themselves
The paperwork with each yard should describe a scope of work owed by the subsidiary, with defined deliverables, acceptance criteria and a price for the outcome rather than for hours. It should name the subsidiary's own project manager as the person directing Félix, set out how he is supervised and reported on, and record that the methodology, tooling and diagnostic software are the employer's property. Anything that reads as staffing weakens it: hourly billing against a yard timesheet, a yard supervisor in his reporting line, or an obligation to supply a person rather than a result. If the contracts were negotiated commercially without any of this in mind, they should be revisited before the petition is drafted, not afterwards.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.