 In September 2015, 
XBHS dedicated the new academic wing which added 15,000 square feet of learning space including two labs and five classrooms for the school's science and engineering programs.Xaverian is sponsored by the Congregation of the Brothers of St. Francis Xavier, known more commonly as the Xaverian Brothers, and for many years the Brothers formed a large part of its faculty.The Xaverian Brothers are a consecrated lay Catholic order of Brothers who strive to fulfill the spiritual aspirations of its founder, Theodore James Ryken, particularly through education.