He earned the right to be arrogant, unless you can match resumes with him.

Oh, I don't know. I have found in my 30+ years in the industry that some of the most knowledgeable people in operations, mechanical and MW are also the most patient and are willing to share information without making someone appear foolish. I also remember as a student dispatcher being hotly chastised by the assigned man for setting a pencil down on the desk facing the wrong way. As I gained experience in the job learned to hold him in minimal high regard.