I am in the same class as Marcus, also on the
CMU campus.
Can't comment for Marcus, but I can answer your questions based on my own experience.
I also got contacted by a number of companies (Invesco, Fidelity, EY, A few of the larger Investment Banks, and a couple medium/smaller sized HFs, ). Basically all of them turned into a first/second round + superdays, and eventually a couple offers.
Regarding what background you need, that is sort of a hard question to answer. Obviously, the more relevant work/internship experience you have, the more likely you are to be contacted; however, this isn't always true. I had no full time work experience (a few engineering internships, but not related to quant finance in anyway), but I had lots of ML + Programming + stats projects related to finance which I think really helped me. So honestly, as long as you have SOMETHING that is in anyway qualitative/technical + finance related, you will probably get something from the resume book.
If you have math + trading competitions on ur resume you increase the chance get contacted by prop shops (but tbh most of the big HFs and Prop shops just make you apply online). I know my friend got reached out to by Sig for their QT and QR internship role because they are an applied math major with some cool projects.
Also, we have a week in between mini 1 and 2 where companies sign up to show up at the NY campus and select students (from the resume book) to interview (thats when I get most of my action), Pittsburgh students have the option to fly in or request a virtual interview.
Overall, which campus you pick really has no effect on the opportunities available to you, just how much you spend in rent haha.
lmk if you have any other questions, hope this was helpful.