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
Advanced Acoustic ConceptsFounded in 1989, Advanced Acoustic Concepts is a U.S. undersea warfare systems company that designs and delivers technology for naval warfighters. It develops sonar and combat-system capabilities and manufactures equipment including CAPTAS 4 at its Pennsylvania facility. AAC is a wholly owned subsidiary of Thales Defense & Security, Inc. operating under a U.S. Department of Defense-approved Proxy Agreement.BLUE BELL, PA