Mr. Simmons gave you some great advice, I would take a very close look that.
I am not an engineer, but I can tell you that Excel is an important skill to have. Excel spread sheets are being used in so many different areas and for so many different purposes. Also, some of the Excel properties help out and interact with other Microsoft Office products.
I work in the aircraft maintenance field, and we use Excel to track multiple items. We have spread sheets to track errors, calibrated tooling, turn overs and pass downs, equipment, scheduled inspections, etc, etc. I see other parts of the company use Excel as well, to fill various needs.
Its great when you can take a whole bunch of data from a spreadsheet, and turn it into a report, with a click of a button. Just like that, you can have a very presentable, visual reference with graphs in color.
I have had to reach out and take a Fred Pryor course on Excel, and it was well worth the cost.
Excel is one of those skills that can help in very many fields. I would highly recommend that you get familiar with this program anyway you can.