Masters in engineering is like a ocean it includes lots of options from where only you can choose right specialisation for you.engineering is not like theoretical that you just need to understand the concept it is based totally on practical like if you choose Computer Aided Engineering or CAXs, design engineering you need to work on table there is no field work other one isbthermal and fluids where you can study about heat and thermal which is good for psu you can take gate exam for the job another one is , Micro Electro Mechanical Systems, material science(composite materials)  which are good and secure areas to explore.