The process began when the recruiter Casey from VA area emailed me wanting to talk. I said ok. Then she disappeared for 2 weeks. After sending her an email and a voicemail , she finally got back to me after 2 weeks (with no apology or explanation). Then she wanted me to talk to the hiring manager. That went well. They then invited me to an all day interview in their Plano campus. I had 6 1:1 one hour sessions including the case study for which I prepared hard. During all of the interviews I got the impression that I did well, I got most of the math case study answers right. Despite all of the good vibes and feedback, the recruiter called me after I called her and said they did not want to proceed. None of the interviewers had the courtesy to email me back on my thankyou emails. Recruiter said she cannot share why they passed on my application.