Gerry Posler, faculty member who served with Jack Riley, a Beta alumnus, as advisor to the new chapter. 1971 Shortly after the initiation of Zeta chapter, Alpha Gamma Sigma was unanimously accepted as a member of the National Interfraternity Conference on June 19, 1971. 1981 In January, 1981 all present members of the IlliDell Cooperative Fraternity at the University of Illinois voted to become a member of ΑΓΣ. The decision to join a national organization came after the membership was assured that its place in the Fraternity would not hide the previous hard work and cooperation by the local chapter that preceded it and that it would be known as the IlliDell chapter. 1999 The colony at Arkansas Tech University was the result of more than two years of coordinated effort between the national officers and staff members, other ΑΓΣ chapters and students of Arkansas Tech to ensure the success of the chapter. On November 20, 1999, 17 men were initiated as the charter class of the Iota chapter. 2016 Beta chapter completed construction of their new house at the University of Missouri. 2021 Gamma chapter at the University of Nebraska-Lincoln completed their new 32,000 sq/ft house at 3445 Holdrege St. Thanks to over 2.8 million dollars in fundraising from generous Alumni, this house is now the largest Fraternity at the University. General information National Headquarters: Columbus, Ohio Membership: Active chapters: 8. Total number of initiates: 4,350. Chapter roll: 1922 Alpha, Ohio State University 1923 Beta, University of Missouri 1953 Gamma, University of Nebraska at Lincoln 1961 Delta, Tennessee Technological University 1970 Epsilon, Missouri State University 1971 Zeta, Western Illinois University 1981 IlliDell, University of Illinois Urbana-Champaign 1999 Iota, Arkansas Tech University See also Professional fraternities and sororities References North American Interfraternity Conference Student organizations established in 1923 1923 establishments in Missouri