The one reflecting the work the person will actually do, confirmed in writing by the employer. Supporting documents should agree with it, and a dated copy of the advertisement should be kept so the difference can be explained accurately rather than from memory.
Keep the record, do not curate it
Save the dated posting and the employer’s explanation before updating the working documents. An employer may legitimately correct or remove a posting; retain the history and distinguish the current job from its earlier description. Keep the revised letter and supporting correspondence so any discrepancy can be explained accurately.
Ask the institution for accurate available confirmation of what has actually been completed and awarded. A thick file of deeds, tax bills, and utility accounts does not make a weak duty description stronger, and it can distract from the records an officer is actually looking for. Build a dated review file around the current statement of work, contracts, payroll identity, worksite list, and any business-ownership records. Request the complete attachment first, preserve its version date, and ask the employer for a signed letter identifying the provisions that govern this particular position. The employer letter should use the legal name and identify the prearranged professional work.