Hello Sridhar,

There are many fields an mechanical engineer can pursue. Some of them are

Product Design:

Designing products ranging from biomedical devices to internal combustion engines to fuel-efficient motor vehicles, motors and appliances.

Research and Development:

Researching new ideas and solutions that satisfy society’s demands or improving or expanding older ideas and solutions.

Manufacturing:

Designing and building the machines that mass produce consumer products. Of prime importance is designing and building machines that improve operating efficiency.

Systems Management:

Managing the operations of a large system, such as a manufacturing facility or a power plant.

Energy:

Planning how energy is created, stored and moved in industries that produce and deliver electrical power, such as natural gas, oil and alternative energy.

Hope this helps