Define them accurately and connect them with the actual duties. Do not replace ordinary concepts with unexplained terminology to make the work appear more specialized.
Use examples that belong to the applicant
Explain the person’s genuine responsibilities and experience. A readable account should preserve technical meaning while distinguishing the applicant’s work from the team’s broader achievements.
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. A specialized-knowledge case built around a company's own welding procedure specifications requires pulling together internal documents that were not created with an immigration filing in mind, which usually takes longer than compiling a certification list and job description. Keep one shared set of corporate exhibits and one individual folder per person holding duties, chronology, and knowledge evidence, and track versions, because the shared set will be updated while individual files are still in progress and mismatched corporate descriptions across a group are noticeable.