A lot of schools have them, they’re basically just a guy on staff who has direct links with HS coaches & recruits, they’re essentially a glorified scout for the recruiting department.
Some schools just delegate more duties to other positions so as to not spread certain guys to thin.
A Director of HS relations is essentially an assistant for the Recruiting Director & the Player Personnel guy within your recruiting department he handles one aspect of the wide scope of a job that a Recruiting Director has.
So basically instead of having 1 guy doing 5 different jobs, they turn those tasks into positions within the recruiting department & give them a fancy title to justify cutting that person a check & hire them to lighten the workload of the RD so he can focus more on recruiting specific targets rather than being bogged down with foot soldier work.