The rank of Firefighter is a member who is 18 years of age or older and has the ability to respond to incidents at any time of the day. Initially newly appointed firefighters will hold the rank of "exterior" and have to complete a 6 month probationary period. During this time you will need to make a certain quota of calls and training's. Additionally, once you have completed the required courses through the county fire training center and you have completed required in house training, you will be granted the rank of "interior" firefighter.