To be brutally honest, IIT Delhi M.Tech program of the Atmospheric-Oceanic Science and Technology branch has a very poor placement scenario. Core job opportunities are scarce and hardly any companies visit with core job offers.
Most students from this branch prefer choosing an elective from the branch that matches their preferences and try to use that knowledge during their placements. Sometimes companies don’t even shortlist this department for placements but you can approach them with the proof that you have studied the required subjects as electives although not as a core subject.