Flight Examiner
I retired as an Examiner with a major airline and now work as an Instructor and Examiner without a medical - I only instruct and perform flight tests in the simulator. The point is that you can't exercise the privilege of the Examiner Rating in an aircraft without a valid medical. There is no restriction to do that in the simulator (In Australia). Some airlines only allow current, active pilots to act as Examiners but in theory it can be done by a "ground based" Examiner.