In 1957, Long Island University comprised two campuses – C.W. Post College on Northern Boulevard in Brookville, N.Y. and the Brooklyn Campus on Flatbush Avenue. Concerned that the campuses were too far apart to provide an education to all interested students on Long Island, LIU President Admiral Richard L. Conolly identified additional geographical areas. Over the next several years the University created a number of extension programs from Hempstead to Westhampton, enabling working professionals to take courses in the evenings and on weekends at locations close to their homes.
In 1959, LIU began serving western Suffolk County with programs at Hauppauge High School. Called the "C.W. Post Hauppauge Extension," the program's enrollment swelled to 400 within a few years. In 1962, LIU opened other extension campuses, including Brentwood High School. Buoyed by the sudden growth, and realizing there was a justifiable need for a more permanent college option in central and western Suffolk County, the C.W. Post Hauppauge Extension and St. Joseph's College signed a five-year lease in 1972 to form a coordinate campus on 100 Second Avenue in Brentwood, N.Y., offering both bachelor's and master's degrees. This new location included 172 acres of tree-lined property owned by the Sisters of St. Joseph. On June 23, 1972 the New York State Board of Regents approved the coordinated program, believed to be the first of its kind in the State of New York.
By January 1976, the two colleges separated and began operating autonomously. Within a few years, the Brentwood Campus of Long Island University (now LIU Brentwood) became known as an innovator in developing Fast-Track Master's Degree programs for working professionals. Academic programs expanded to include mental health counseling, an accredited business program, and a thriving teacher education program that increased campus enrollment to more than 1,000 students.
Today the Brentwood Campus continues to cater to a population of working professionals and adult students. Current academic offerings include master's degrees in criminal justice, school counseling, mental health counseling, early childhood education, childhood education, special education and literacy, library and information science, and, in 2012, the LIU Post RN-to-BS Nursing degree. Courses are taught by a combination of LIU Post and LIU Brentwood full-time faculty and adjunct professors. Graduate courses are offered in conjunction with a number of different programs offered by LIU Post. An undergraduate degree in criminal justice is also offered at Brentwood and is taught by accomplished terrorism experts, police officers and judges.