A signed job description from the company, an organization chart showing who reported to him, pay records for the year, and documents evidencing authority: hiring approvals, budgets, supplier contracts and performance reviews he signed.
Collect decisions, not adjectives
Hypothetical example: the retailer's description of the operations director calls him 'senior leadership' and 'responsible for operations' without saying what he decided. Replace adjectives with evidence. List the branch managers and department heads who reported to him, with their own roles; attach the annual operating budget he prepared and the board minutes approving it; include two or three hiring recommendations he signed off, a supplier agreement he executed and a disciplinary letter he issued. Pay records should cover the full continuous year, and if the company paid him partly by dividend because he is also a minority shareholder, explain that and show he was employed in the role. Then do the same for the U.S. position prospectively: the chart, the roles beneath him, the authorities he will hold. The petition is filed on Form I-129 with the L supplement and fees on the USCIS schedule. A tidy binder of decisions convinces where a paragraph of titles does not.
Hypothetical example: a Canadian maker of industrial safety harnesses proposes its sales director for a U.S. affiliate role. A dated payroll history, tax records, and an organizational chart tied to each pay period establish the required one continuous year of qualifying employment in the three years before the case. The document review should also separate authority actually exercised abroad from authority merely promised in the United States. L-1A time cannot exceed seven years, so the assignment letter should not imply an open-ended transfer.