If Welder is from another project, all of these 3-documents are required, (a) WQT Certificate, (b) WQT RE Report and (c) Continuity Report to establish that he has worked for Aramco projects within the last 6 months are required (See Attachment 1-Sample).
If above 1 and 2 are not available, please arrange WQT Application from a third-party agency (See below list along with the WQT details) and provide the confirmed test schedule once finalized.