SPA has contributed to the decisions concerning elements of the current U.S. national security establishment. For example, The strategic deterrent force structure and the characteristics and capabilities of Trident submarines, weapon systems, and missiles, The Department of Homeland Security's strategies and risk approach to readiness and preparedness to prevent, mitigate, and respond to terrorist threats to the nation's critical infrastructure and key resources, The Missile Defense Agency and the Navy's Aegis Ballistic Missile Defense (ABMD) program, The force structure and characteristics for the Navy's Maritime Patrol Aircraft (MPA). The Company's services include: Force Structure Analysis, Warfare Assessments , Systems Engineering and Technical Trade-offs, Cost and Cost-Effectiveness Analysis, Program Management and Acquisition Reform Support, Database Development, Financial Management Support, Business Process Reengineering and Information Technology, International Cooperative Development, Modeling and Simulation.