hi,

generally mathematical engineering is a branch of applied mathematics, which includes complex analysis, differentiation, real analysis etc, psus like power grid, ntpc, ongc, indian oil hires candidates with gate score. however so far m.sc graduates are eligible to appear in gate exam, but the most of the vacancy comes for engineering graduates as management trainee profile in psu as per previous years data.  there is very less requirement for students of general science in psu. but you must check the job alerts page regularly to get latest updates. mathematics back ground student may apply for m.tech or phd course based on gate score.