Use accurate dates, employer information and records of the actual work. Explain what each assignment contributes to the knowledge account. Attach the artefacts rather than describing them: the specification the applicant authored, the change log bearing their name, the validation report they signed, the training material they wrote for the team that followed. Records made while the work was happening carry the date and the authorship that a later summary cannot supply.
Avoid counting the same period twice
If responsibilities overlapped, show that clearly rather than presenting them as consecutive employment. Identify any breaks or employer changes for timing review. The chronology should preserve the facts even when a simpler résumé would look more convenient.
The contradiction that undoes a chronology is usually arithmetic. A résumé rounds each assignment to whole months, the periods are laid end to end, and the total quietly exceeds what the payroll register and the employment contract show. Nobody intended the overstatement, which came from tidying.
Reconstruct the timeline from the employer's own records first and write the narrative against it, flagging overlaps and unpaid leave rather than smoothing them away. Where the legal employer changed between rotations, name each entity and the date of transfer, since continuity of employment and the qualifying corporate relationship are assessed on those entities rather than on a shared brand.