Yes. At IIST You will be an opportunity to for ISRO after you complete Your graduation and meet the criterion specifies by ISRO. IIST is a premier Institute of India for Aeronautical Engineering they offer admission based on Your ranks in JEE Advanced and some seats are also filled by KVPY. The fee at IIST will be fewer compared to other Institutes as You will be going to work for ISRO after passing out.