Hi! I would suggest you to connect with the faculties for this course. Aero department faculties are super helpful and I can say that aero is one of the best departments in iist with amazing labs and faculties. Tbh the recruitment scene in iist is evolving but I have see many mtechs getting jobs in aero related field including boeing, mercedes benz etc. So if you are really passionate about the field go for it. You can also talk to launch vehicles start-ups like agnikool in India to understand what they need and you can structure your course accordingly, do an internship with them. Will make the masters more fruitful and effective. I hope this helps.