For starters

IIT Delhi faculty is organized into departments, centers, and schools. They are collectively known as academic units. All faculty members are members of some academic unit. Joint faculty members are members of multiple units but may yet have a ‘home’ unit. (There are also a few inter-disciplinary groups. You will get to know them in due course and may start new ones of your own.)

Teaching assignment is handed by each academic unit’s head. Do not expect to be sent out to the classroom on day one. (Or day two or three.). In rare cases, a head may be desperate to have a course taught by some new faculty member, but even in that case, you will probably have had a discussion about it before joining. In most cases, you will have a few months to settle in. You may want to get started soon, though, as you will need students to work with you on research and you need to get to know them and allow them to get to know you. An advanced course in your area of research is a good starter.

On the other hand, you may be anxious to hit the ground running on research. After all, you may have already been working on many threads recently and may be eager to tie them up. For some, you will need support – students, laboratory, equipment. For everything, you will need an office where you can shut the outside hubbub off.