Should I Reach out to my interviewer first?

Ok so i was recently matched to my interviewer via a conformation email sent to the both of us to follow up with each other. However it’s been a few days and i haven’t heard from him yet. Should i contact admissions and inform them about it or email him directly instead?

I don’t think you need to be proactive, but if you wanted to, I would suggest contacting him directly… (paraphrasing) “I see we’ve been matched, my greatest availability is x, y and z but I can make also myself available at different times if these don’t work for you.”