Applied for the position on 20 July, had a telephone interview roughly a week and a half later. Telephone interview was done as a team with two people asking general tech questions. Following week I got an email asking to come in for a face to face, which was scheduled for early August. Felt the interview went fantastic. Their facilities were incredible and I was genuinely excited about everything they showed me. I was with them for several hours so I felt that they were willing to move forward considering how much time they spent with me. After following up several days after the interview, I've been met with nothing but radio silence. Followed up about three weeks ago, and recieved no response. Considering the silence as a "no thank you." Very unprofessional and I expected much better from an institution with Columbia's reputation.