Junior Sword Drill used to shave their heads during their "tryouts."
Looks as if he might have been one. Top junior NCO's tryout. Their one and only performance is at the Ring Ball when Seniors receive their class rings.
Bond Volunteers, who's top performers become the elite drill team The Summerall Guards are not allowed to shave their heads but must have it cut close enough that only a pair of tweezers can grab a hair. (And when I was a BV and later became a Summerall Guard, we certainly wanted no part of the Ashley River's stinking, putrid mud in our hair, so it was a true blessing.
He’s a senior, note the ring.