I started in 1975 with a gas company. I designed distribution systems for new subdivisions, designed large industrial and commercial metering facilities. Designed regulator stations, etc. All using formulas for gas flow and capacity. I figured the bill of material down to the nuts and bolts. I also did the cost estimates for these jobs. I also bid the jobs, and worked with the winning contractor to get the projects done. I also inspected said projects. All using drafting pencils and drafting tools and a calculator. Then in the 1990's I had to learn AutoCAD as we began drawing everything with the computer. Cost estimates, and bids were done on the computer.
