It is a core discipline of engineering and a large number of jobs are available in government and private sectors as well.
1. First of all, you need to qualify GATE exam with a valid score. Then you will be able to apply in big PSUs like BHEL, BEL, ONGC, HPCL, IOCL, GAIL, SAIL, NTPC, NHPC, NALCO, DMRC, BARC, Coal India Ltd. Bokaro Steel and Bokaro thermal etc.
2. You can also apply in Government sectors like MTNL, BSNL, Railways, ISRO, DRDO, Police Departments.
3. You canalso apply in MNCs Siemens, TATA motors, Larsen & Turbo, Asoka Leyland, Thermax etc.
To find a job you can search jobs online direct on company's websites or in newspapers such as employment news paper or Times of India. You can get registered yourself on online job portals.
After getting some experience in this field you will get better opportunities.