It's just a thought experiment.
Oh, you don't mean those kinds of marauders.
Well then, I guess you'd have to use your tech skills in a way that's useful to them, or even build up your own group. Assuming tech knowledge hasn't somehow returned to the dark ages, someone who knows how to build and fix machines is going to be invaluable to one of those groups. Could be a chance to write some sort of communication app too, assuming smartphones still exist (or something much simpler, if you'll have far more outdated technology to work with). Something like Signal or Telegram seems like it'd be rather useful to work with in the event of a civilisation collapse.
If society collapsed how would you acquire those, and how would you stop others from stealing them from you?
Answer those two questions and you'll have somewhere to start.
If this ever did come to pass (which I think is highly unlikely) you'll want to be fit, strong, and intelligent. I don't expect "interviews" would ever be a thing, but who knows. Watch some horror movies, see how individuals join/form groups, and stop over-thinking!