Systems Definition, Inc. (SDI) is a government technology contractor founded in 2002 and headquartered in Alexandria, Virginia. The company specializes in developing software solutions for the First Responder community, the Department of Defense, and commercial clients operating in defense and emergency services sectors.
SDI's technical work spans modern web application architectures, including Java, JavaScript, and React for front-end and back-end development, with PostgreSQL databases and microservices patterns. The team works with cloud platform orchestration tools to build and deploy its systems.
One of the company's key products is fireground accountability software designed to process radio data, SCBA (Self-Contained Breathing Apparatus) telemetry, and emergency alerts for first responders. SDI describes itself as a growing small business with an agile development environment and a collaborative work culture.
