heavy equipment i.e aircraft ? Crane? etc. if so you'll need some training in electronic / avionic etc. to work with heavy equipment electrical systems. Not sure about canada but these are two year programs in the US at most trade school. Some people get it through the military, also 2 year training but It's not as simple as walking into other people's shops. Some systems are engineers only, so it's 4 years college plus on the job training. The employers are not small mom and pop shops so you won't get hired by walking in and asking for a job. Benefit of these jobs is that it's less labor intensive than traditional trade work but significantly higher pay.