The options are:
1. Talk to the pilot one to one
2. Talk to the Occupational Health department
3. Talk to the Human Resources department
4. Talk to the management
5. Talk to the pilot's or your own AME
6. Talk to the medical department of the CAA
Which option would work best for the situation that you or the pilot is in depends on a lot of factors which you will have to weigh in.
HTH
FD