As you completed your engineering for the branch Mechanical engineering you may be go for the GATE Examinations. As many of the companies select on the bases of the GATE Examinations or do MBA for higher studies .

the Employment Areas are as follow:

Automobile and auto part manufacturers
Aerospace industry
Various Government sector undertakings
Aviation companies
Steel plants
Thermal plants and gas turbine manufacturers
Air conditioning and refrigeration industry
Shipping industry
.Engineering consultancies
.Armed forces

you may apply for the civil services examinations as the conducted by the UPSC . the IES Examinations that is for Engineers .

or you may apply in the following Pos that are :
ONGC (Oil & Natural Gas Corporation)
DRDO (Defence Research and Development Organization)
SAIL (Steel Authority of India)
NTPC (National Thermal Power Corporation)
VSSC (Vikram Sarabhai Space Center)
ISRO (Indian Space Research Organisation)
IOC (Indian Oil Corporation)


You may also apply in the following IT Companies that are as follow:>

Infosys
Tata Consultancy Services (TCS)
Wipro
IBM
Tata Technologies
Accenture