University School of Jackson gains its strength from the diverse interests, backgrounds and education of its faculty. All teachers are college graduates who have teaching certificates in their subject areas or are teaching in their field of specialization. Faculty members themselves are continually learning; nearly every teacher attends at least one outside workshop each year.

USJ faculty members are respected in their fields by their peers. Several of the Upper School teachers, for example, are called on each year by the College Board to grade Advanced Placement tests.