I started my working career in junior high school (7th grade) fixing and maintaining all the equipment for a rental business. You know, the rental store where one can rent anything from party supplies, to lawn equipment, to camping equipment, to backhoes and crawler dozers. I learned to tear down and repair most anything mechanical. I worked in that business from 1964 till 1979 when I got into my present career.
I now work as a "tool room machinist" for a major "design and build" machine shop. Our company builds the equipment, which the car maker or furniture maker or washing machine manufacturer uses, to build the product which he sells to you and I. The gear case in the washing machine you have in your home was very likely built on our equipment. The hypodermic needle at your doctors office may have been sharpened and assembled on our equipment. If you buy a "Pella" brand window or door to put in your new home, that door or window unit was manufactured with equipment I and my fellow coworkers built.
It is a very interesting line of work and it is neat to see how things have changed of the past 29 years. Everything we build now days is very computer controlled and built for high speed production. If thirty years ago a machine was expected to be able to produce "x" number of parts per day, that number is now 10, 20 or even more times that!!
Sometimes that is for the better but sometimes I wonder at what cost. Things that used to be bolted together (which makes it repairable) are now riveted or glued or heat welded because it's faster to make that way and lowers production cost. Bad thing is those parts now have to be replaced "as a unit" rather than rebuilt because there is no way for a repairman or mechanic repair a sub assembly.
At any rate, I hope my next career is "full time grandpa".