British firefighters can't have beards either.

https://www.local.gov.uk/fire-and-rescue-service-common-myths

>Can I be a firefighter if I have a beard? > >There are health and safety reasons why facial hair below the top lip cannot be accepted. As a Firefighter you will be required to wear a facemask when you are wearing breathing apparatus. To ensure that the facemask forms a seal around the face, it is necessary to keep the face shaven to prevent any dangerous airborne chemicals entering the facemask. Fire services work closely with the manufacturers of the equipment to look for new ways of overcoming the issues with facial hair, however an acceptable alternative that would meet health and safety requirements, has not yet been found.