Hello candidate,

Hope you are doing well.

As per your question, after completing you BSC mecs  you can apply for ISRO but for that you have visit their regularly as they declare this kind of exams on thier official sites only. You can check your syllabus at their official website for further information and updates. You can check thier sites for the vacancy of scientists and other posts as well.

If you want to know more about career opportunities then you can visit their officials.

Hope this information helps you out. Thank you.