L-3 National Security Solutions (NSS) is the national security group of L-3, focused on helping government and defense customers address complex security challenges. Its work combines engineering, adaptive processes, and specialized expertise to deliver integrated solutions across four main areas: full-spectrum cyber operations, enterprise and mission information technology, intelligence operations support, and operational infrastructure solutions.

NSS provides secure communications, network and mobile-device capabilities, and information-integrity services, including support for lawful offensive operations. Its information technology offerings help customers manage, move, secure, and interpret large volumes of data through shared services, transformation, and resource rationalization. Intelligence support spans functions such as collection, analysis, dissemination, training, visualization, and situational awareness. The group also develops and delivers integrated solutions for security needs involving facilities, installations, borders, transportation, and other infrastructure.

The website lists products and programs including biometric identity management, transport systems, and support for organizations such as SOCOM. It also highlights contract vehicles and partnerships, presenting NSS as a provider of mission-focused capabilities for public-sector and national security environments.