Use actual employment, duty and company relationship records with relevant dates and locations. Explain the knowledge acquired and its application to the proposed U.S. role. Ask what each record proves on its face and when it was created. A document made at the time of the employment carries the dates and the entity name without argument; a summary written now to explain that period carries only its author's account of it.
Preserve the original history and clarify language needs
Identify what each record establishes and any appropriate translation requirements. Do not replace a foreign employer’s legal identity with a current Canadian group name merely to simplify the story. Order the request around dates the holder can act on, since a former employer will search a defined period faster than an open-ended topic, and an archive request often moves at the pace of a quarterly administrative cycle rather than a hiring one.
Hypothetical example: a specialist who built a wood-products quality certification programme abroad finds that the employing subsidiary was dissolved at a fiscal year end and its records passed to a successor. Rather than rest on a former supervisor's letter, the file requests the successor's registry entry showing that transfer together with the payroll and project records it now holds, so the employment and the relationship are both evidenced by documents created before any of this was contemplated. Settle translation requirements at the same time, because they extend every subsequent date.