dear aspirant,

You can peruse post-graduation in the field of aerospace engineering to have a career in this field .

Basic eligibility to take admission in this course is graduation i.e. BE/B.Tech in aerospace or allied specializations.Candidates   with   degree   in   other   branches   of   Engineering (i.e.   Mechanical,   Civil,   Electrical,   Electronics, Instrumentation or allied branches) are eligible for admission to specific specializations of Aerospace Engineering, if they have valid GATE score.

Aerodynamics (AE1)
Bachelor's degree in Mechanical Engg. / Cvil Engg. with valid GATE score in ME/CE
Dynamics & Control (AE2)
Bachelors degree in Mechanical Engg,/ Electrical / Electronics/Instrumentation Engg.with valid GATE score in ME / EE/ EC / IN.
Aerospace Propulsion (AE3)
Bachelors degree in Mechanical Engg. with valid GATE score in ME.
Aerospace Structure (AE4)
Bachelors degree in Mechanical Engg./ Civil Engg. with valid GATE score in ME/CE.
Also  candidates having First class or 60% marks (55% marks for SC/ST) in Bachelor's degree ( B.E. / B.Tech. or equivalent) are eligible.

hope this helps.

good luck