It depends on the type of engineer, but, in general, I think that we all manage energy as a merchandise to be got fron Nature and that can be elaborated or transformed, transported, distributed, purchased and sold, to, finnally, be utilized and consumed. All whith a maximum of efficiency and at lower costs, contamination included.
For Electric Power Engineers, electric energy unit is the kilowatthour (kWh) equivalent to 3.6 MJ (megajouls) Julian
By manageing money. On defination of a good engineer is that he or she can do somethinf for $1 that anyone else can do for $2. Look at all the things around you that are cheaper and better ( or that weren't even here then ) than they were 10, 20, 30 or even a hundred years ago. Engineers did that.
