all most every engineer ends up in management...u stay in the techincal side for maybe 5,10,15 year and then u start to manage projects, work for companies etc
thats where the business knowledge of a commerce degree or MBA comes in handy.
I spoke to an engineer right at the top of a company hierachy and he reccomended engineering commerce if thats the path u want to take.
Else, there is engineering law which is combined 6 yrs which would make u very sort after in a techonologically advnacing world where most lawyers are oblivious to cases they have to work on...for eg a civil engineer starts asking a lawyer we doin an arch span with thtis streess and this material, is this legal, the degradation factor is 8.9230489720, will that fall below legal limits within 10 years...
i dunno, i guess an engineer with legal background or lawyer with engineering background, would be quite stimulating and u would have no trouble finding a job since an employer can kill 2 birds with one stone