After its foundation on 24 November 1908 at the University of Washington , Xi Sigma Pi remained a local chapter until 1915, when discussion and a new constitution led to an opening for national expansion. The Beta chapter was founded at Michigan State in 1916, followed by the University of Maine in 1917, thus spanning the nation. Over 40 chapters have now been established. The Society of Xi Sigma Pi was admitted to membership in the Association of College Honor Societies in 1965. Government is by convention, held biennially in conjunction with the annual meetings of the Society of American Foresters. Each biennium, a chapter is designated the National Chapter, from which national officers of that biennium are chosen. The governing chapter for the 2018-2020 period is Epsilon Chapter at the University of Idaho, Moscow.