hello,

there are any rare posting through gate as those organisation are not high in number. They declare openings. you have keep track of it and apply accordinly to get an opportunity to go through the selection process and get a job at a space center. Few days back ISRO has opened many vacancies. if you are eligible then you can apply for it. just go to the official page and apply. Keep checking different organisation official webpages and apply accordingly.

Hope it helps!