As you say that you have completed your B.Tech in Aeronautical and want to apply for ISRO, NAL or HAL. You can definitely work in these government firms. Here I am providing you basic eligibility for this. This is as follows:

Eligibility:

The applicant should score at least 65% of marks in the engineering level.

The GATE score are required to enter the public sector. Many public service undertakings (PSUs) in India are recruiting through GATE.

Selection process:

The usual selection procedure followed by maximum no. of PSUs includes the following stages:


StageI: Written Examination (Generally on Sunday)

StageII: Interview and GD

StageIII: Medical Examination

Examination pattern


Examination pattern will be different for vary from one PSU to another.

Number of Questions: 150200 Question
Time duration: 2 – 2½ Hrs
Negative Marking: 1/3
Technical:75% of total questions
General aptitude with English: 25%