Hi, a staff member discovered he was positive today. i was not in contact with him but was in contact on 24/6 with his supervisor who works next to him. i dont have any symptoms. ?

Watch and wait: If the superior has not tested positive your risk for infection is minimal. I trust that you wear a mask in public, including in your office and try to keep safe distance. Wish you good health!

Test: If both you and his supervisor practiced social distancing and/or wore masks when around each other and since you have no symptoms ( and I assume the supervisor has none) I wouldn't think you need to isolate yourself unless your test(which I recommend) comes back positive.