Marmon Aerospace & Defense

Marmon Aerospace and Defense Group is a collection of specialist wire, cable, thermocouple and fiber optic businesses headquartered at 680 Hayward Street, Manchester, New Hampshire. Its parent companies are Marmon Holdings and Berkshire Hathaway. The group supplies high-performance wire, cable, fiber optic and connectivity solutions for commercial and military aerospace, defense, space, power generation and advanced industrial customers, and describes its reach as from sea to space.

Product lines

• Wire and cable: mil-spec wire and cable such as M22759, M27500 and M17, crosslinked ETFE (XLETFE) and data cables
• Thermocouple wire and assemblies for high-temperature sensing
• Fiber optic cable and assemblies for aerospace and defense
• Cable assemblies and harnesses built to customer specifications, and engineered-to-order custom cables
• Mil-spec wire, cable and connector kits for maintenance and repair

Services

• Engineering and design of wire, cable, assembly and thermocouple solutions
• Calibration services
• Thermocouple refurbishment
• Kitting: sustainment kits
• Field services: turnkey copper and fiber-optic connectivity for military and aerospace markets
• Hands-on fiber-optic training

Group businesses

• Marmon Defense: wire and cable, Manchester, New Hampshire, rebranded in 2026
• Harbour Industries: wire and cable manufacturer for over 60 years, Shelburne, Vermont
• Marine Tech Wire and Cable: York, Pennsylvania
• TE Wire and Cable: thermocouples, Saddle Brook, New Jersey
• KITCO Fiber Optics: fiber optic connectivity for over 30 years, Norfolk, Virginia
• CCPI Europe: thermocouples, Sheffield, United Kingdom

Markets and applications

The site lists commercial aerospace (avionics, flight systems, airframe, cabin management, in-flight entertainment and electronic wiring interconnect systems), military aircraft, naval ship systems, ground vehicles, space and satellite systems, and power generation including gas turbine and aeroderivative engines. Defense applications include C5ISR and electronic warfare.

Company facts

• News page reports construction beginning in August 2026 on a 350,000 square foot expansion of its Hooksett, New Hampshire facility
• The group listed Farnborough International Airshow 2026 among its events