During the fall of 1989, the foundation of Sigma Lambda Gamma National Sorority, Inc. began when a group of collegiate women recognized the need to form an organization that provided empowerment to women of all cultural backgrounds at the University of Iowa. The humble beginning of Sigma Lambda Gamma was built at the University of Iowa, Iowa City, Iowa. Under the guidance of University of Iowa staff, Esther Materón-Arum,
and Mary Peterson, the vision came to fruition on April 9th, 1990, when the University of Iowa Panhellenic Council officially recognized the organization as a sorority.
Through the continued commitment and leadership of the founding mothers, Gloria Cuevas, Julieta Maria Miller-Calderon, Maria Ester Pineda, Danell Marie Riojas-Carbajal, and Guadalupe (Lupita) Temiquel– McMillian, the operation of Sigma Lambda Gamma National Sorority, Inc. began to thrive nationally.