Not automatically. Each engagement must fit the applicable TN requirements and be covered through the appropriate authorization process.
Assess the additional proposal on its own
Identify the second employer’s duties, duration and payment terms, and compare the work with a listed profession and its qualifications. Do not assume a similar title or overlapping skills makes the second role equivalent. Bring the existing status record to review so the next procedural step addresses both the current permission and the proposed change.
A second, independent finding asks whether the American position consists of professional surveying, and a role built around crew supervision and subcontractor coordination will not satisfy it however impeccable the credential is. The experience must be evidenced rather than asserted, which means letters from former clients or employers describing the consulting work performed, engagement letters, and a record that lines up with the years claimed.
Where the answer stays unclear, look at what the employer has already sold: a client statement of work or project appointment naming the role responsible for the deliverables tells you more about the position's substance than the adjectives in an offer letter.