From my electrical experience, even though I never went to school for this I am a quick learner and meticulous when terminating and interpreting blueprints which is my strongest skill.
From my costumer service side, I've learned that being patient and polite is the best way you can treat people that needs your help and I am good at it.
This was a temporary project I was in, right before we moved out to Texas.
In Mexico there is a company in charge of giving services to gas stations such as repairs, refills, tanks cleaning (that's part of maintainance) equipment replacements like breakers, screens, hoses and even stickers everything you see a pump has on, either costumers had a contract or was a one time service we would provide. This company, GAREL, would also build new gas stations from scratch since we had all that was needed to build them.
I was part of the customer service area, and I would perform tasks like: