[4] Sigma Iota Alpha was founded on September 29, 1990, by thirteen women from four colleges in New York: University at Albany, SUNY; SUNY New Paltz; Stony Brook University; and Rensselaer Polytechnic Institute.

[3] The founders include Dora Maria Abreu, Elizabeth Coats, Tina Colberg, Eulogia Diaz, Angelica Hernandez, Teresa Herrero, Norma Porras, Miriam Ramirez, Saida Rodriguez, Grecia Sanchez, Maria Trujillo, Clara Vasquez and Dulce Williams.

[3] The mission of Hermandad de Sigma Iota Alpha, Inc. is "to formalize, cultivate, and foster bonds amongst each other as sisters and abide by respect, trust, communication, professionalism, and accountability.

"[3] Alpha Iota Sigma's goals are to increase awareness of the diverse Latino cultures, to promote leadership amongst the sisters, and to serve as "models of excellence in education and achievement amongst women.

[3] SIA has supported several philanthropic initiatives since its establishment, promoting service on three levels: international, national, and local.

[11] Throughout the last 30+ years, Hermandad de Sigma Iota Alpha, Inc. has grown to include 62 undergraduate chapters, thirteen regional alumnae chapters, and seventeen colonies in the states of New York, Massachusetts, Connecticut, New Jersey, Pennsylvania, Maryland, Virginia, Georgia, Florida, Illinois, Michigan, Texas, California, Kansas, Arkansas, and South Carolina.