ThayerMahan, Inc.

ThayerMahan, Inc. is a maritime technology company headquartered in Groton, Connecticut, specializing in autonomous maritime surveillance and offshore solutions. The company's core business involves designing, manufacturing, and operating systems that collect acoustic and electronic information from the world's oceans. Its mission is to deliver scalable, mission-ready unmanned acoustic sensing capabilities to enhance maritime domain awareness, safeguard critical infrastructure, and strengthen national and energy security, ultimately protecting maritime food supplies, trade routes, industrial infrastructure, and borders.

ThayerMahan offers a range of key products and systems, including Outpost®, SeaPicket®, TransparenSea®, and SeaGuard™, which provide unmanned acoustic intelligence and persistent undersea surveillance. The company provides end-to-end autonomous system deployment, field operations, continuous data collection, and advanced analytics for its clients. For commercial clients, services include seabed surveys, unexploded ordnance (UXO) detection and clearance, cable route support, subsurface noise mitigation, and marine mammal monitoring. For defense customers, ThayerMahan delivers uncrewed maritime surveillance systems for persistent, wide-area acoustic sensing and real-time intelligence. The company serves diverse market segments, including government (defense, homeland security, coast guard) and commercial (offshore energy, subsea infrastructure, maritime security, environmental monitoring).

Founded in 2016 by Dr. John Kao, Mike Connor (CEO & Chairman), and Richard Jude Hine (Vice Chairman & President, ThayerMahan Offshore), ThayerMahan is privately held and venture capital-backed. Recent notable developments include the launch of SeaGuard, a non-kinetic unmanned underwater vehicle (UUV) defeat system in March 2026, and the commencement of Linear Hydrophone Array manufacturing at a new Connecticut facility in June 2026. In August 2026, the company successfully detected, tracked, and classified UUVs at Lanternfish 26, and a NOAA demonstration in March 2026 confirmed its ability to detect illegal, unreported, and unregulated (IUU) fishing. ThayerMahan has also secured significant funding, including $20 million in additional Series C funding in January 2024 and $30 million in Series C funding in April 2023. The company strengthened its leadership team in February 2025 with key promotions, including John Russ to COO and Mike Varney to President of ThayerMahan Ocean Technologies, as it continues to expand its manufacturing capabilities and workforce to meet growing global demand.