It not quite that simple. You will first need to get Clearinghouse approval. For the most part, it is just a technicality.
Speaking from all of zero experience. It might first be prudent for him to make sure he is eligible with the NCAA through NCAA Clearinghouse. Then go by the athletic facility and ask to speak to the director of football personnel to see what the process is for him to follow. My guess is going straight to a coordinator will either result in them not responding to emails or calls, or them telling him to go to someone else. Also it might be helpful for him to have a former high school or college coach contact someone on the football staff and put in a good word.
Yeah, That's what I said. He's been trained and coached by former UT players, so it seems to me like they could give him a contact/ put in a word.
I was thinking a couple years ago a story came out about a guy on staff that primarily managed the walk ons when there was a well known try out on campus
Walk-ons, preferred and otherwise, must meet NCAA eligibility requirements. This includes maintaining amateur status, as well as meeting academic requirements. To qualify as a walk-on, a player must be enrolled at the college, as a full-time student, prior to fall tryouts. Tryout dates for walk-ons are usually posted online or published in local newspapers. Incoming freshmen may benefit from having their high school football coach contact someone on the college coaching staff. In addition to NCAA eligibility requirements, some universities have school-specific guidelines. Refer to the school's athletic department website for details.