Established in 1991 as the Special Environmental Services Unit of Radian International, Signature Science, LLC specializes in an array of technical services related to national security and law enforcement, environmental management and biotechnology. The company, created by an employee-organized buyout of the Special Environmental Services business unit, is a subsidiary of the Southwest Research Institute. Signature Science, LLC provides services in various areas, such as home land security, field validation, statistical data evaluation, toxicology, microbiology, analytical chemistry, law enforcement, alternative fuels and energy. Some of its applications include tactical training, technical training, quality and risk management, operations and applied science.