Fire Service Tests Does A Medical Discharge From The Forces Exclude A Person From Joining The Fire Service?

Does a medical discharge from the forces exclude a person from joining the fire service? - fire service tests

I am currently in the Navy, but it's possible that I could get a medical certificate after a broken leg thats causing enormous problems to the required weight for the Marines. I really want to join the fire service and can pass the physical tests, but I've heard that is sick now, not at the stage of recruitment. Does anybody know if this is true or not?