Today is the era of computation. In this field of vast computers, wise human beings are in demand to command, interpret and translate the computer well and reinforce the industry keeping at pace with the modern updates and more smart competitors.
I personally know a friend , who after completing M.Tech from IIT Bombay in propulsion with flying colors, presently works in Honeywell as a CFD Design Engineer with a handsome salary.
Other possibilities include switching to other engine and thermodynamics based industries like automobile etc.