IN THIS GUIDE · Explain company knowledge without disclosing confidential material unnecessarily
Describe a concrete application of the knowledge
Choose a real task and explain which company-specific knowledge it requires. Identify the relevant product, process or procedure and the person’s involvement. L-1B concerns special or advanced knowledge under the applicable standard; a skill does not have to be secret or held by only one employee to merit assessment. Choose the task by asking what a competent newcomer could not do in the first month, and say why. Name the product or process, the decisions the work involves and the consequence of getting them wrong. L-1B also requires the same qualifying employment abroad as the other L categories, generally one continuous year within the preceding three, so the knowledge account sits on top of a chronology that has to be established separately.
Show how the expertise developed
Prepare a chronology of relevant projects, training and responsibilities. Distinguish ordinary familiarity with the industry from the knowledge being relied on. Ask colleagues who can explain the work to identify supporting records. A long service history alone does not explain the nature or level of the claimed knowledge. Assemble the chronology from records that already exist: project assignments, internal training registers, release notes bearing the person's name, handover documents. Each entry should say what was learned and where it came from. Distinguish knowledge that travelled with the industry from knowledge that exists because this company built something a particular way. The second category is what the account rests on, and it is usually much smaller than a first draft suggests.
Connect the knowledge to the proposed assignment
Explain which U.S. duties would use that knowledge and why the supporting examples are relevant. Have the companies and qualifying employment history assessed as well. A convincing technical explanation cannot substitute for the other L requirements, and an assignment label cannot replace the actual work arrangements. Write the United States duties as tasks rather than as a role, then draw a line from each task back to the specific knowledge it needs. Tasks with no such line are ordinary work and should be described as such. L-1B status also carries a five-year maximum, so an assignment expected to run longer needs a plan discussed in advance rather than an assumption that an extension will be available.
Agree an evidence-sharing method
Start by naming the available records and their custodians rather than sending an unrestricted archive. Ask counsel which detail is needed and how confidential information should be handled. Preserve original documents and let the reviewer assess whether any proposed redaction would remove facts necessary to understand the evidence. Agree in advance who may approve disclosure and how long approval takes, because that lead time usually sits outside the case manager's control. Where a customer contract restricts what can be shown, identify the clause and ask whether a summary written by the company would meet the same need. Keep an unredacted copy in the company's own file so a later question can be answered from the original rather than from the version prepared for release.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.