Sounds like the simplest way to handle this is to do what ctacker has suggested. If you're required to have this process performed by a CWI and you're in a position to stay with the CWI during the process, watch and learn from him/her, and ask a lot of questions. After all, they're working for your company, so learn all you can while you can. If this government work is to be in accordance with the Structural Welding Code, the code does not solely require a CWI. There are provisions in this code that allow acceptance and rejection of materials and workmanship by someone competent enough to perform this work based on their training and experience, or both, in metals fabrication, and inspection and testing. A CWI may be required by contract documents, but again, learn all you can from this person. It may be of great value to you later on.