The instructor was employed by the Attila Guard Dog School. He had quite effective teaching methods, until Poncho showed up.
At some unspecified point, he was hired on as a class instructor by the Attila Guard Dog School. It is unknown how many classes he taught before he had the misfortune of teaching Poncho. During Poncho's enrollment, he briefly considered quitting. It is unknown whether or not he did this.
His personality is that of a drill sergeant--type forced into a less glamorous job. The rest his personality was never really explored, as Poncho was always interrupting the class.