prior to welding: layout, fit-up, sub-assembly & final-assembly inspections Perform QC inspections NDT1 witnessing on back gouging of critical welds Perform QC inspections after welding: dimensional checks components, inspection of welds prior to NDT, NDT arrangements & NDT requests Perform QC inspections final Qualified Trade; minimum Level 1 Welding & Fabrication Inspector Certificate. Knowledge & Experience: