What are placement opportunities for students pursuing an M.Tech in mechanical engineering from IISC, Bangalore?

Well honestly, once you are in the grasp of the IISc magic, you will forget about placements, and your hunger for higher studies and research will grow instead. The intense workload and the dynamic research environment will bring you close to some of the geniuses who may be pursuing a Ph.D., UG, or master's. Interacting with them will make you realize that higher studies are a better option. Some who go for jobs anyway, come back to get a PhD sometime later. This is what the IISc effect is after all.

As for the IISC placements for MTech Mechanical Engineering, students receive a minimum of 8 LPA packages with no limit on top packages varying from 15-25 LPA CTC. The major recruiters include companies like TATA motors, TATA steel, TCS research, Mahindra motors, Philips, Airbus, General Electric, Rolls Royce, TATA advanced system, PTC, L&T, and other design, manufacturing, and petroleum companies. The best part is that students of this branch can sit for placements in companies of Aerospace, Civil, Chemical, and Material Engineering as well. 

In all placements at IISc won't be an issue for either branch yet I will say again, judging a research-oriented institute like IISc on the basis of placements is not justified.