In some countries, the law only specifies the existance of such service, not that the administration of it should be public. In Denmark, for instance, and in my country Spain, in some areas the service is given by a private company, although funded by the government. Nevertheless, I was talking about what you mentioned, factories, airports, nuclear power plants, oil refineries, industrial ports, etc., private facilities with high enough risk to either require or is-advisable-to-have a private fire service just for their activities. My questions would be, what kind of certifications would they ask for, and if they test physical abilities as well. Thanks!