Use relevant projects, training and responsibility evidence with an explanation of the applicant’s actual contribution. Identify who can verify the work.
Avoid claiming ownership of the whole process
Distinguish individual knowledge from the work of other teams. Explain what each record supports and preserve dates and context. An integrated-system diagram is useful only if its connection to the applicant’s experience is clear.
The reviewer needs to understand the process and the person's experience with it, not an unexplained volume of sensitive files. A credential may address professional qualification while work examples explain knowledge of internal processes. Start with the artifact: a dated specification, patent filing, validation report or software repository log that shows the proprietary process exists and when it was developed. Build an evidence chain from the employee’s foreign experience to specific decisions embedded in the course. A validation report signed by the employee shows responsibility for a process. Obtain the final publication, contributor statements, drafts or revision history, and employer records identifying which tests, diagrams, or explanations the applicant produced. Employer letters should explain significance without claiming that publicly available technical skill is proprietary. The useful file is a chronology, not a pile of selected papers: identify the author, date, purpose, and point each record actually establishes.