IN THIS GUIDE · Show knowledge that belongs to the company, not the trade
Start with the L-1B eligibility and application overview
Name the proprietary thing the knowledge attaches to
The petition should identify a concrete product, service, technique, process or procedure of the organization, such as drying schedules developed for particular species and kiln configurations, a moisture-control protocol, a grading system or specialized software. The knowledge may be proprietary, but it need not be proprietary or unique. The evidence must show that Tomasz's knowledge is special relative to what is generally held in the industry or advanced relative to others in the organization. General kiln-operation skill does not qualify merely because it is deep; the legal distinction is the special or advanced character of the knowledge, not whether it originated exclusively inside the company. Ask which manuals, configurations or internal decisions would be unavailable to an ordinarily skilled new hire. Naming that material is more useful than claiming that the employee is indispensable.
Show how the knowledge was acquired and how rare it is
The evidence usually includes how long the specialized processes have existed, how many people in the organization hold the knowledge, how long training a replacement would take, and what the business consequence of doing without him would be. Records help: internal training materials he wrote or received, revision histories showing his contribution to the protocol, and the reason he rather than a colleague is being sent. A statement that he is the most experienced operator available is not the same evidence. Where the knowledge is genuinely narrow, saying so plainly and quantifying it is more persuasive than superlatives. Build a small evidence trail showing access, training and use: version history, restricted materials and contemporaneous work records. A tailored support letter is strongest when it points to those independent records.
Handle placement at another company's site carefully
If the United States work will be performed at a site controlled by someone other than the petitioner, additional restrictions apply. The person must not be principally under the supervision and control of the unaffiliated company, and the placement must not amount to providing labour for hire. Where an L-1B employee is stationed at a customer site, the petitioner must remain the employer that directs the work, and the arrangement should be documented in the services agreement rather than described loosely. Commissioning equipment at an affiliated mill inside the group avoids this issue entirely, which is a reason to be precise about which entity owns the site. Read the customer contract alongside the job description. It should show that the group retains responsibility for the specialized work rather than merely supplying a person to fill the customer's ordinary role.
Count the year abroad and the five-year limit
The Canadian employer and U.S. petitioner must have a qualifying parent, branch, subsidiary or affiliate relationship, and both must remain actively doing business throughout the transfer. Tomasz must also have one continuous year of qualifying employment abroad within the preceding three years. A gap in employment during that window, a period on contract rather than as an employee, or time working for a company outside the group can shorten the qualifying period, so payroll and employment records should be checked before filing. L-1B status is limited to five years in total, and time already spent in the United States in L or H classification generally counts toward it. Set the expected completion date against time already spent in L or H classification. If the assignment exceeds the available period, the company needs a lawful alternative before relying on a later extension.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.