How does one who holds a BSc/MSc degree in chemical engineering and wants to work as maintenance and repair expert (i.e. those people you call to fix your NMR or other instrument when it breaks) for various instruments (Bruker, Mettler, Merck, Agilent, JEOL e.g.) get the necessary education and licence for that?
Is that provided by special institutions or course organizers or the producer itself? I wasn't able to find any ads for such positions for complete novices, and that's kinda confusing.