Founded in 1995 by electrical engineer Dr. Laurence R. Riddle, Signal Systems Corporation is a small, research-driven Maryland company serving defense and other advanced technology customers. Its 20-person staff includes 18 engineers with master’s degrees and seven with Ph.D.s, and the company is known for turning acoustic research into fielded sonar systems and sensing solutions.
Defense Architecture Systems, IncFounded in 2010 by Micah Carlson after 14 years at Johns Hopkins University Applied Physics Laboratory, Defense Architecture Systems is a small, cleared Maryland company built to move promising research into equipment that works in the field. Its multidisciplinary team works with defense, intelligence, space and commercial customers from early concepts through production, using an in-house facility to keep development and manufacturing closely connected. DAS is particularly known for adapting sensing technology to demanding operational environments.FULTON, MD
PURVIS SystemsSince beginning with sonar experiments aboard the USS Hugh PURVIS in 1973, PURVIS Systems has grown into a Rhode Island engineering company serving defense and public safety organizations. Its 125-plus experts are known for sustaining a long-running U.S. Navy relationship while supporting mission-critical work nationwide, including a Fire Station Alerting System used by more than 250 fire and EMS departments. PURVIS achieved CMMC Level 2 certification with a perfect assessment score in 2025.QUEENS VILLAGE, NY
GIRD Systems, IncFor more than two decades, Cincinnati-based GIRD Systems has developed custom signal-processing, communications, and electronic-warfare solutions, delivering them as hardware systems or reusable firmware IP. Its team of PhD-level researchers and experienced engineers creates and tests algorithms for demanding commercial and military applications, including the company’s configurable GIRD Digital Radio. GIRD also works with prime contractors from initial waveform design through system implementation.CINCINNATI, OH