Hi

After completing Btech in Mechanical Engineering,  their are ample amount of opportunities. Almost 60% of industries in world are mechanical based. 

To make a good carree in field of design the Engineer should have sound knowledge of following subject

1. Machine Design

2. Kinematics of machines

3. Dynamic of machine. 

4. Solid mechanics

5. Strength of mechanics

6. Design for manufacturing

Following are the company dealing with design and manufacturing

1. Automotive 

2. Aerospace

3. Bearing industry

4. Turbomachine

5. Power plant 

6. Sheet metal