Preserve the names of the entities that actually employed the person during each period, along with the documents explaining any merger, rebranding or ownership change, rather than restating the whole history under the company's current name.
Make the employment record traceable to real events
Match each employment period to the corporate document that explains it, and flag any gap or inconsistency instead of smoothing it over. A reviewer needs to see which legal entity employed the person at each point, since a name change and a transfer to a different employer are treated differently.
If the parent holds the subsidiary through a holding corporation or if two operating companies are affiliates because the same individuals own both in the same proportions, include the intermediate documents and a short ownership diagram. The relationship the classification recognises runs through ownership and control, so the useful documents are the ones that show who holds the shares: articles, registers, share certificates, purchase agreements and any trust or shareholder arrangements sitting behind them. Build the organization evidence from records that existed for business purposes: ownership documents, payroll, reporting lines, invoices, and descriptions of the overseas and U.S. operations.