Hello Swapnaeel

For becoming Scientist at ISRO,these are the ways :

• Complete 12th in PCM, join IIST through JEE and later one will be absorbed in ISRO as scientist / engineer subject to maintaining required minimum CGPA.
• Join B.Tech in mechanical , electronics and CSE at some reputed IIT, in last few years there have been some recruitments directly from IITs as well.
• Complete B.Tech in any college , write ICRB exam and after clearing personal interview join ISRO. This is specifically for Btech in ME, ECE, CSE.
• There are options to join ISRO after M.Tech as well. Mainly Mechanical, electronics  jobs will be there for people with M.Tech.
• There are recruitment for some scientist engineers from other domains as well.

Hope it helps.

Hello!

To Get recruited into ISRO as Scientist/Engineer by one of the following ways.

1.ISRO recruits some freshers in campus drive from some IITs and NITs.

2.Complete B.E./B. Tech from any other AICTE approved college in India, give ICRB's exam for Scientist/Engineer for your stream, clear the interview and get into ISRO.

Hope this Helped:)