Only if the corporate relationship already exists, the qualifying year is complete, and the evidence can be assembled quickly. Premium processing shortens the government's decision, but it does not shorten the time needed to document the knowledge and the placement.
Count the weeks before filing, not just after
The government's decision under premium processing is measured in business days, which makes it tempting to promise the customer a date. The weeks that matter come before filing. The employer needs to confirm that the petitioning U.S. entity is related to the East Hants shop, that the engineer has one continuous year on Canadian payroll within the last three, that the customer contract describes implementation of the shop's procedure under the shop's direction, and that the knowledge evidence exists in written form. A request for evidence adds months. Hypothetical example: an East Hants shop has no U.S. subsidiary at all and assumed the customer could sponsor; the customer is not a related company, so no L-1B petition is possible and the plan must be redesigned before any date is discussed. Until status is approved, the engineer can attend meetings as a business visitor but cannot perform productive work on the customer's floor.
Hypothetical example: an East Hants food-process analytics developer promises a related U.S. entity that its specialist will install a proprietary dashboard before a production launch. The first review should set dates for confirming the corporate link, verifying the qualifying Canadian employment year, collecting controlled records, filing, and any response period. The customer launch date is not an immigration deadline that agencies must meet. If the evidence is incomplete, postpone productive work or change the commercial schedule instead of sending the employee to perform it as a visitor.