Longman Dictionary of Contemporary English
fire service
noun
EXAMPLES FROM CORPUS
▪ After this he joined the fire service and works today for the Shropshire Fire Brigade.
▪ An old armchair could have fatal consequences, long before the fire service has arrived to tackle the flames.
▪ He contacted the fire service who hosed the burning car.
▪ Our concern is with the fire service and doing our small part to help that out.
▪ The fire service did their best to help people even though the station was flooded.
Wiktionary
fire service
n. 1 (context countable English) fire department 2 (context firefighting English) Service in a fire department or other firefighting organization, whether as a chosen career, or as a result of volunteering or a form of prison labor.