Record the actual dates and circumstances. Training attendance and qualifying foreign employment are different facts, even when they occur during the same period.
Avoid replacing one chronology with another
Identify work location and relevant employment evidence. A certificate date does not automatically establish a continuous qualifying foreign year.
Documents the company generated about its own systems: authored protocols, internal training curricula and completion records, laboratory specifications, change approvals, and a count of employees able to operate the systems unaided. Internal design standards, the sequence library and its revision history, commissioning checklists that carry the employer's own methodology, training material written for new technicians, and project records showing which installations the specialist personally configured all describe knowledge that is specific to the organization. Almost everything useful here already exists inside the employer and costs retrieval time rather than production money: the controlled procedure with its revision history, the training matrix, signed work records, a letter from whoever supervises the process. Version histories showing who revised a procedure and when, training records showing who taught whom, and internal correspondence discussing a problem and its solution all place the employee inside the company's methods rather than merely near them.