you do stand a good chance of S&T jobs after mba from a top bschool. MFE from a top school lik berkeley/cmu/nyu/uchi/columbia also open doors.
that said, i haven't met any one from tuck so far...
the demand for MBAs in S&T jobs is declining, shifting to more specialised masters/phds. MBAs are more into sales/structuring jobs, in which school brands/ MBA certificates help. If risk/trading is what you want, then you will be competing MFE/Math/Phds, which is by no means easy...