Her credential is not in doubt, but the category requires prearranged professional employment with an American employer and does not allow self-employment in the United States. An equity stake is not automatically fatal, though it shifts the question from qualification to control, and the file then has to show that the practice, not the applicant, directs the work.
Two findings are needed, and only one of them is about her
The first finding concerns the applicant: Canadian or Mexican citizenship, and the occupation's own rule met. Hypothetical example: Elise, a Canadian-citizen veterinarian offered a share in the American practice hiring her, clears both. The second concerns the position, and it asks whether the work is professional work within the listed occupation and whether it is employment at all.
Ownership is where those two findings collide, because a practice in which the applicant holds an interest may look like her own venture. The evidence that answers it is prosaic: an employment agreement with a fixed salary, a named supervisor, defined hours, and a shareholders agreement showing she cannot direct the practice on her own. Hypothetical example: a soil scientist from the same municipality is offered an American role titled sustainability lead whose actual week is spent assembling corporate environmental reports.
Her degree matches a listed scientific occupation, but the work described is corporate reporting rather than soil science, so the position fails even though the person qualifies.