Leidos Holdings, Inc., together with its subsidiaries, provides services and solutions in the defense, intelligence, civil, and health markets in the United States and internationally. The company operates through Defense Solutions, Civil, and Health segments. The Defense Solutions segment offers national security solutions and systems for air, land, sea, space, and cyberspace for the U.S. Intelligence Community, the Department of Defense, the space development agency, the National Aeronautics and Space Administration, defense information systems agency, military services, and government agencies of U.S. allies abroad, as well as other federal and commercial customers in the national security industry. The solutions include technology, large-scale systems, command and control platforms, data analytics, logistics, and cybersecurity solutions, as well as intelligence analysis and operations support services to critical missions. The Civil segment provides systems integration services to air navigation service providers, including the federal aviation administration, the En route automation modernization, advanced technology oceanic procedure, time based flow management, terminal flight data management, geo-7, and future flight services, as well as enterprise-information display systems; and security detection services. It also offers information technology (IT) solutions in cloud computing, mobility, application modernization, DevOps, data center, network modernization, asset management, help desk operations, and digital workplace enablement; and environment, energy, and infrastructure services. The Health segment offers solutions to federal and commercial customers responsible for health and well-being of people, include health information management, managed health, digital modernization, and life sciences research and development services. Leidos Holdings, Inc. was founded in 1969 and is headquartered in Reston, Virginia.

Parsons Corporation provides integrated solutions and services in the defense, intelligence, and critical infrastructure markets in North America, the Middle East, and internationally. The company operates through Federal Solutions and Critical Infrastructure segments. The Federal Solutions segment provides critical technologies, such as cybersecurity; missile defense; intelligence; space launch and ground systems; space and weapon system resiliency; geospatial intelligence; signals intelligence; environmental remediation; border security, critical infrastructure protection; counter unmanned air systems; biometrics and bio surveillance solutions to U.S. Department of Defense, including military services; Missile Defense Agency, the Department of Energy; the Department of State; the Department of Homeland Security, and the Federal Aviation Administration. The Critical Infrastructure segment provides management, design, and engineering services, as well as offers leveraging sensor solutions. This segment develops digital solutions for next generation aviation, rail and transit, bridges, roads, and highways; and provides water and wastewater treatment systems; AI/ML, and digital twin and cyber systems integration services; planning, engineering, and management services for infrastructure, including bridges and tunnels, roads and highways, water and wastewater, and dams and reservoirs. Parsons Corporation was founded in 1944 and is headquartered in Chantilly, Virginia.

Science Applications International Corporation provides technical, engineering, and enterprise information technology (IT) services primarily in the United States. The company's offerings include IT modernization; digital engineering; artificial intelligence; Weapon systems support design, build, modify, integrate, and sustain weapon systems; and end-to-end services, such as design, development, integration, deployment, management and operations, sustainment, and security of its customers' IT infrastructure, as well as training and simulation and ground vehicles support which integrates, modify, upgrades, and sustains ground vehicles for nation's armed forces. It serves the U.S. army and navy; air force, other Department of Defense and Federal Government; joint commands and space force; federal civilian agencies; health services; and space industries. The company was formerly known as SAIC Gemini, Inc. and changed its name to Science Applications International Corporation in September 2013. Science Applications International Corporation was founded in 1969 and is headquartered in Reston, Virginia.

DXC Technology Company, together with its subsidiaries, provides information technology services and solutions in the United States, the United Kingdom, rest of Europe, Australia, and internationally. It operates in two segments, Global Business Services (GBS) and Global Infrastructure Services (GIS). The GBS segment offers a portfolio of analytics services and extensive partner ecosystem that help its customers to gain insights, automate operations, and accelerate their transformation journeys; and software engineering, consulting, and data analytics solutions, which enable businesses to run and manage their mission-critical functions, transform their operations, and develop new ways of doing business. This segment also simplifies, modernize, and accelerate mission-critical applications that support business agility and growth through applications services; provides proprietary modular insurance software and platforms; and operates a wide spectrum of insurance business process services, as well as helps to operate and improve bank cards, payment and lending process and operations, and customer experiences. The GIS segment offers security services, such as IT security, operations and culture for migrating to the cloud, protecting data with a zero-trust strategy, and manage a security operation center; and cloud infrastructure and IT outsourcing services. This segment also delivers a consumer-like experience, centralize IT management, and support services, as well as improves the total cost of ownership; and orchestrates hybrid cloud and multicloud environments. The company markets and sells its products through direct sales force to commercial businesses and public sector enterprises. DXC Technology Company was founded in 1959 and is headquartered in Ashburn, Virginia.

ICF International, Inc. provides management, technology, and policy consulting and implementation services to government and commercial clients in the United States and internationally. The company researches critical policy, industry, stakeholder issues, trends, and behaviors; measures and evaluates results and their impact; and provides strategic planning and advisory services to its clients on how to navigate societal, business, market, business, communication, and technology challenges. It also identifies, defines, and implements policies, plans, programs, and business tools through a range of standard and customized methodologies for its clients' business context; conducts survey research; collects and analyzes various data to understand critical issues and options for its clients; and provides actionable business intelligence, as well as information and data management solutions that allow integrated and purpose-driven data usage. In addition, the company provides solutions to optimize the customer and citizen experience; modernizes IT systems; and cyber security solutions that support the range of cyber security missions and protect IT infrastructures in the face of relentless threats, as well as designs, develops, and implements technology systems and business tools that are key to its clients' mission or business performance. Further, it informs and engages its clients' constituents, customers, and employees through public relations, branding and marketing, multichannel and strategic communications, and reputation issues management. The company serves energy, environment, infrastructure, and disaster recovery; health and social programs; and security and other civilian and commercial markets. The company was formerly known as ICF Consulting Group Holdings, LLC and changed its name to ICF International, Inc. in 2006. ICF International, Inc. was founded in 1969 and is headquartered in Reston, Virginia.

V2X, Inc. provides critical mission solutions and support services to defense clients worldwide. It offers a suite of integrated solutions across the operations and logistics, aerospace, training, and technology markets to national security, defense, civilian, and international clients. The company was incorporated in 2014 and is headquartered in Reston, Virginia.

Telos Corporation, together with its subsidiaries, provides cyber, cloud, and enterprise security solutions worldwide. The company operates in two segments, Security Solutions and Secure Networks. It provides Xacta, a platform for enterprise cyber risk management and security compliance automation; and consulting, assessment and compliance, engineering and evaluation, operations, and penetration testing services. The company also offers Telos Automated Message Handling System, a web-based organizational message distribution and management for mission-critical communications used by military field operatives; Telos Advanced Cyber Analytics solution, which is a threat feed source of global Internet Protocol addresses known to engage in potentially malicious activity, including mass scanning and generic opportunistic attacks; and Telos Ghost, a solution to eliminate cyberattack surfaces by obfuscating and encrypting data, masking user identity and location, and hiding network resources, as well as provides security and privacy for intelligence gathering, cyber threat protection, securing critical infrastructure, and protecting communications and applications. In addition, the company provides IDTrust360, an enterprise digital trusted identity risk platform for extending flexible hybrid cloud identity services; and ONYX, a touchless fingerprint biometric solution for mobile devices. Further, it offers secure mobility solutions that enable remote work and minimize operational and security concerns across and beyond the enterprise; network management and defense services for operating, administrating, and defending complex enterprise networks and services for defensive cyber operations; and operates TSA PreCheck enrollment centers. It serves the United States federal government, large commercial businesses, state and local governments, and international customers. Telos Corporation was founded in 1968 and is headquartered in Ashburn, Virginia.

Castellum, Inc. provides services in the areas of cybersecurity, information technology, electronic and information warfare, and information operations. Its services include intelligence analysis, software development, software engineering, program management, strategic and mission planning, information assurance, cybersecurity and policy support, data analytics, and model based systems engineering services. It serves customers in the federal government, financial services, healthcare, and other data application sectors. The company is based in Bethesda, Maryland.