Hello Aspirant,

You can join Air force as ATC through UPSC CDS or AFCAT  examination for these examination you must have completed graduation and for AFCAT you must have 60% in graduation and minimum 50% in 12th with physics and mathematics for UPSC CDS there is not any percentage criteria.

Hope it Helps.

Thanks.

Dear aspirant,

To join Indian Air Force in ATC branch you must complete regular full-time undergraduation of 3 years from Science Stream (Physics and Mathematics) or 4 years undergraduation course (B.E/B.Tech). You must apply for the AFCAT Exam. In AFCAT you must apply for the Non Technical aka Ground Duty Branch, you may get the fighter controller or Air Traffic Control according to your performance during the training.

Hope this helps.

Good Luck!!