Our Story
The SI Organization, Inc. (the SI) is a leading provider of full life cycle, mission-focused systems engineering and integration capabilities to the U.S. Intelligence Community, Department of Defense and other agencies.
Applied Communications Sciences brings key capabilities in cyber security and information assurance, network and operations, data analytics, advanced software and methodologies, wireless and mobility, application engineering and integration, smart grid, and optical networking and quantum technologies.
We understand the importance of protecting your sensitive information. Find out how we’re applying our SE&I and Cyber Security expertise to improve your defenses against cyber threats.
Learn how the SI's unique brand of SE&I can help your organization with architecture definition, requirements analysis, engineering trade studies, technology integration and deployment, configuration management, mission assurance, and risk management.
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Our People
The SI employs more than 2,100 people, with major locations in Chantilly, Va.; Denver; Laurel, Md.; Los Angeles; and Valley Forge, Pa. Find our why our people make the difference.
