We have just taken on a new firefighter that we are having a few problems with. This person has been on for three months and is just finishing the Firefighter II class that our department runs new recruits through. This person is in his mid-thirties and has never been involved in firefighting before. Our problem is this person thinks he already knows everything there is to know about firefighting. This becomes a problem somewhat on scenes, but is normally taken care of by the IC. There is more of a problem in training where I, the training officer, will find this person explaining a subject to another firefighter at the same time I am trying to teach it. I have told him to listen to me when we are training, but it just doesn't seem to work. He even puts off the vibe that he knows more than anyone on the dept. Any suggestions on how to deal with this? Thanks for your help