If what you're doing is Tech Records I'd have to agree it's not a career path with too many options - though it does get you a peep at the internal vacancies first when they occur. A part time degree with somebody like
www.part66.com could open some doors, would the company help?
Some words on NDT as well as I was involved in a past life. The qualification requirements are quite rigorous requiring both fairly expensive courses and months of hands-on logged hours. Per discipline. You would never get the hours even if you wanted to pay for the courses, unless you were working for somebody who was in efect sponsoring you through it and was prepared to supervise you while you were learning. Many people come up through the oil and gas industry as they do a lot of inspection of pipes etc. Some component overhaul firms may be able to help as NDT of various housings can be part of their standard process. The most valued technique is eddy current and predictably this is also the hardest one to qualify in.
More info here:
http://www.bindt.org/downloads/PCNGEN.pdf