If you have the space, you can create an "isolation room" for the first few days he is back where he can self quarantine. Have cleaning supplies outside the door so he can spray sanitizer on his luggage, clothes, accessories and hands before coming in, and keep his mask on. You can also stock up on self test kits - although I'm sure his company will provide sufficient for him. These are what some people who are highly exposed (Eg medical officers in USA) are doing to protect their families (some installed outdoor showers and change out of outside clothes too). If you are worried about the inconveniences of being listed as a close contact then I guess he has to stay at a hotel, but I think that's a bit harsh if everyone's expected to be asymptomatic (young age, vaccinated).
Anonymous