Hi there im looking to go for a working holiday visa.
I am currently looking at going to do PCN Non Destructive Testing (UT dye pen and magnetic)

Could I go over on a working holiday and do this job? And how could I get residency through it

Thanks

Don't know the answer to the first question, but if you are accredited to international standards that will definitely help you get work.

If you are looking at residency you will need to check if your occupation is on the CSOL. The closest I could find is '312912 - Metallurgical or Materials Technician' on schedule 2. Might be a bit of a stretch, but you will need to read up on the requirements to see if your training/experience will get a positive outcome. Since it is on schedule 2 you will need to find a sponsor, either a state or company for permanent residency.

That's the one!
If it is that could I get in?

If you can find a job you can get Employer-sponsored 457 visa yes, for up to 4 years, then if you meet the requirements for a Permanent visa & they were willing to sponsor you for it you could apply for that.. for an overview of all .these visa options got to www.immi.gov.au/skills/skillselect/

How much experience do you have?