Getting an interview to meet with the fire department is a big deal because obtaining the title of a firefighter can add many benefits to your life and resume. So what do you wear? Well, first of all, you should know you will likely be meeting with several people who will be asking you a series of questions to get to know who you are, what you like, and how you can benefit the fire department. Remember, they are looking for people who can fit into their organizational culture and help their team. It is not uncommon to meet with 2-4 people from the fire department who will independently score you.
One of the first steps to showing the board you are serious is to dress for success. Unless told otherwise, all interview rules apply. Although some may not expect a suit or dress, you should come to make your best impression. Coming in dirty work clothes or like you just arrived from the gym may not give the best impression. If you take the time to prepare for the interview, it shows you are serious about wanting the job.
If you don't have a suit or dress, wear whatever you have that makes you look and feel your best. If you're not sure, ask ahead of time what the dress code is for the interview. If they say "casual," that means clean, pressed clothes. Jeans and t-shirts are not a good option unless they are clean, dark, and accompanied by a blazer and dress shirt.
An interview of any type requires you to plan ahead to ensure you are showing your best self to those who know nothing about you. Whether the job is for a career position, part-time, on-call, or even volunteer, someone that day will decide if you are the right fit for the position YOU applied to get. Dress your best and let them know you take your application process seriously. Good luck!