My first job was sweeping up around an electronics plant, 1961.  I broke my wrist roller skating and had to quit after a few months.

After high school I got a job for a year as a draftsman with an Air Conditioning Contractor, until they went out of business.

Then I went to work for various engineering firms (3) over 25 years while I got my P.E. license and did HVAC/Plumbing design work.  I was Chief Engineer for 15 years before getting out of the design end.

I now do due diligence work for lenders.