Start with the L-1B eligibility and application overview
Identify knowledge actually held
Specialized knowledge can concern special knowledge of company products or other interests and international application, or advanced knowledge of processes and procedures. It need not be unique or proprietary. Separate the colleague’s knowledge, the transferee’s current ability and further handover still planned.
Complete the assignment and relationship record
Prove the qualifying corporate relationship and continuous qualifying foreign employment year within the relevant three-year period. Explain actual US duties and supervision. Primary offsite placement with an unaffiliated employer raises control and labour-for-hire restrictions. New offices need sufficient premises and financial ability to pay and commence business; initial approval is limited to one year.
Employment days and actual business activity
US days do not count toward the qualifying foreign employment year; a trip does not automatically break continuity. The qualifying organization must provide goods or services regularly, systematically and continuously in the United States and at least one other country. New-office treatment concerns actual US doing business for less than one year, rather than incorporation alone.
Hypothetical example: a junior scientist seven months into a handover
Hypothetical example: a Saanich company spun out of a university laboratory manufactures a benchtop spectrometer and wants to place a scientist at a US customer’s research facility to commission three units and train the customer’s staff. The retiring senior scientist wrote the calibration routines and has handled every field commissioning for a decade; the proposed transferee joined four years ago, has met the one continuous year of qualifying employment abroad, but only began the handover seven months ago. The employer’s first draft explains that she was chosen as the successor and will finish learning before travel. That framing invites the question the officer must answer: what does she know today? The stronger file shows the two commissioning jobs she completed alone in the last quarter, the revised alignment procedure that carries her name in the document control system, the internal training she delivered, and the customer-support log in which she resolved calibration faults without escalation. Knowledge still to be transferred is listed honestly as future training, not counted as present expertise.
File after current knowledge is documented
Sequence the petition around evidence rather than around the retirement date. Let the transferee complete at least one unsupervised commissioning first, have her author or co-author the procedure she will apply in the United States, and only then draft the support letter. Confirm that the US customer facility placement leaves her under the petitioner’s direction and that she is not being supplied as labour the customer controls. Note the ceiling: L-1B status is limited to five years in total, so a long commissioning and training assignment should be planned within that limit from the first entry.
Identify the specific knowledge, not the years of service
Where a specialist is placed principally at a third party's location, the arrangement can only be supported if the petitioner continues to control and supervise the work and the placement is not in substance the supply of labour to another business. Exclude US days from that calculation, recognizing that qualifying brief visits do not themselves interrupt continuity. For work primarily at an unaffiliated employer’s site, assess both statutory bars: being controlled and supervised principally by that employer, or essentially providing labor for hire rather than a product or service requiring knowledge specific to the petitioning employer. Name the proprietary process, product configuration, methodology, or market knowledge and identify the records that show its restricted or unusual character. Familiarity with a widely used tool does not by itself resolve the organizational-knowledge or placement questions.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.