I've worked with my grandfather since I was about 17 in his air conditioning business. I helped install a lot of systems, but never worked with the electrical/plumbing side of it. That's why I say mostly general labor. Other than that, I've worked with industrial exhaust systems. Installing them, I mean. I did security for about a year. Non-commision. I'm 23. Still got some energy in me. Though I've had a hernia for about 4-5 years that hasn't been taken care of. I can still do some hard work. I just have to watch myself sometimes.