At the Final meeting, in Tillett Hall at Rutgers University, Livingston Campus on April 5th, 1979, Lambda Sigma Upsilon Latino Social Fellowship, Inc. was established. The official motto of the fellowship was "Latinos Siempre Unidos" (Latinos Always United), thus the acronym "LSU". The twenty founders of Lambda Sigma Upsilon are:

Proudly, this Social Fellowship was able to facilitate effective change as a liaison between Latino students and university bureaucracy. Throughout the 1980's Lambda Sigma Upsilon enjoyed steady growth, incorporating chapters throughout the state of New Jersey. In the fall of 1986 a group of 10 gentlemen at the New Jersey Institute of Technology established the Pioneros Chapter. The men who established this chapter were determined to ensure that Lambda Sigma Upsilon would continue to be a force on college campuses across the country for many years to come.

Fellowship to Fraternity
The brothers from the Pioneros Chapter saw that being under the fellowship designation was not being helpful to LSU because it would not allow them certain rights that other Greek organizations were receiving. They would also not be able to participate in any "Greek - Related" functions, which hurt the fraternity's ability to market itself. A proposal to change the designation of Lambda Sigma Upsilon from Latino Social Fellowship to Latino Fraternity was put for review by the State Board of Lambda Sigma Upsilon and the founding fathers. There was much controversy surrounding a possible change, after all, a fellowship, in the eyes of our founders and the brothers after them, was the closest thing to a family, and it also felt as if there was a surrendering to the traditional "Greek" system. The debate lasted for months, in the Fall of 1987 the brothers finally agreed to change the designation to fraternity, thus the name Lambda Sigma Upsilon Latino Fraternity, Inc. was adopted.

The NIC and the road to Nationalization

From 1987 to 1994 the fraternity concentrated on improving its chapter services and ensuring that the chapters in New Jersey would become self-sufficient entities within the organization. On April 2nd 1995, 3 gentlemen from Bloomsburg University in Pennsylvania established the Tikal Chapter. This was the first chapter for Lambda Sigma Upsilon outside the state of New Jersey, which began to spark interest in other schools from outside the state. The State Board of Lambda Sigma Upsilon began to discuss the restructuring of the organization and the possible expansion to new schools. The first step in nationalizing the fraternity was to apply for membership into the North American Inter-fraternity Conference (NIC). On December 3rd, 1997 Lambda Sigma Upsilon Latino Fraternity, Inc. was given membership status in the NIC, thus making Lambda Sigma Upsilon an official National Fraternity. Since then the fraternity has restructured itself to meet the needs of other chapters across America. In the spring of 1999 Lambda Sigma Upsilon established a presence in the Ivy League schools by establishing the Mexica Chapter at Princeton University. In the fall of 2000, Lambda Sigma Upsilon established a presence in the State of Florida when the Kogi Chapter was established at the University of Miami. In the spring of 2001, LSU added to its southeastern presence with the addition of the Czar Chapter at the University of Central Florida, and it solidified the Northeast Region when the Cayuga Chapter at Lemoyne College in Syracuse, NY was established. In the spring of 2002 we added 5 new chapters reinforcing the states of PA & NY with their second chapters. We added two new states, Virginia & Connecticut, Seneca Chapter, Virginia Polytechnic Institute and State University and Mohegan Chapter, Sacred Heart University Fairfield Connecticut.