Allowing openers and closers to view the same contact

Allowing openers and closers to view the same contact

In my organization, we have 1 room of openers and another room of closers.  If an opener converts a lead to a contact, and assigns the contact to a closer, how does the opener monitor where the process is for that contact only? I don't want other openers or closers to see those records. Only the person who opened it and the person who is closing.