[charlie]

(as eddy current for oil & gas is completely different from Aerospace (even as materials, srtuctures and even the qualification of methods, procedures and personal differs totally) you should get a NAS410/EN4179 Training and show the necessary paractical experience in the aerospace field. If you should work for suppliers working on behalf of the big Airframes or engine companies, Training according EN4179 or NAS410 is mandatory. If you work for MROs things may be different but finally it is advisabele to check for the needs defined by FAA or EASA whos rules are taken over worldwide as the major airframers and engine manufacturers come from US oor Europe.
PCN is a special standard of UK but not fully recognized outside.)