The first round interview was conducted over the phone by 4 interviewers. It was pretty standard. quetions included tell me about yourself, previous experience with projects. Two days after the first interview, I was offered an on-site interview as the second. I stayed in the Center for a little more than half a day, interviewed with 3 panels each for half an hour, did a presentation for about 20 minutes including Q&A, did a writing test for 45 minutes, finally a one-on-one interview. People there were really nice.