With more than 2,000 employees across the Five-Eyes nations, Ultra Maritime designs and manufactures undersea warfare and anti-submarine systems for allied navies. The company brings more than 80 years of sonar experience to sonobuoys, acoustic sensing and torpedo defense, while developing autonomous capabilities for air, surface and undersea platforms. Its global operations span 10 locations in four countries, with manufacturing sites in the United States, United Kingdom, Canada and Australia.
ISO 9001:2015
certification
AS9100:2016
certification
ISO 14001:2015
certification
ISO 45001:2018
certification
ISO/IEC 27001:2013
certification
Phoenix International Holdings, IncFounded in 1997 by six underwater operations experts to repair U.S. Navy ships, Phoenix International Holdings now provides manned and unmanned underwater services and engineering for commercial and government clients worldwide. The employee-owned company operates from eight U.S. offices and combines commercial diving with deepwater robotics, including in-house-designed vehicles capable of working to 6,000 meters. Phoenix’s quality system is certified to ISO 9001:2015 across its locations and lines of business.LARGO, MD
ESCO MaritimeFormed in 2025 from the acquisition of a long-established Ultra Maritime business, ESCO Maritime brings together naval-defense operations with roots reaching back to 1951. More than 510 professionals across four U.S. and U.K. locations support allied naval programs with systems designed for demanding maritime missions.YAPHANK, NY
Sentient Digital, IncFounded by Chris Mobley in 2017, Sentient Digital, Inc. is a Brunswick, Maine engineering and technology company known for its focus on undersea warfare and maritime security. Its teams develop mission technologies for the Navy and other defense users, turning research and operational requirements into deployable systems and actionable information.334511DOYLESTOWN, PA
Cobham-UltraBuilt from the combined engineering histories of Cobham and Ultra, Cobham-Ultra develops bespoke subsystems and systems for mission-critical work in defence, security, and critical detection and control. Its businesses span maritime defence, intelligence and communications, precision control for aerospace, and investment in space technology. The group traces its roots to Cobham’s 1934 founding as Flight Refuelling Limited and Ultra’s 1920 electronics factory, giving it more than 200 years of shared engineering history.VICTOR, NY