It can be prepared for appropriate confidential review, but redactions should not remove the substance needed to assess the claim.
Agree on an authorized evidence package
Identify the owner of the material and how it may lawfully be shared. A description should still explain the employee’s actions, relevant knowledge and actual result. Avoid replacing every meaningful detail with an unexplained claim of confidentiality; discuss suitable supporting evidence and secure handling with the reviewer.
Almost every organization holds more supporting material than it realizes: system configuration documents, internal standard operating procedures, project plans and post-implementation reviews, training decks, and the records showing who attended what and when. Internal records that existed before the transfer was contemplated: training curricula, controlled procedure documents, engineering change notes, deployment logs, and evidence of how few people in the organization hold the same knowledge. Sequence the evidence from pre-existing materials outward: internal manuals, version histories, training records, deployment tickets, customer requirements and declarations from knowledgeable supervisors. Organizational records showing the specialist as the custodian or primary author of these internal documents, distinct from a general roster of certified welders, help the adjudicator see the specialized-knowledge claim as tied to the company's own system rather than restated industry competence.