Senior plc designs, manufactures, and sells high-technology components and systems for the original equipment manufacturers in the aerospace, defense, land vehicle, and power and energy markets in the United States, the United Kingdom, and internationally. It operates in two segments, Aerospace and Flexonics. The company offers fluid conveyance and thermal management components and sub-systems for fixed-wing and rotary aircraft, aero-engines, spacecraft and a variety of other industrial applications, and complex precision-machined parts used for conventional and advanced land vehicle propulsion systems, petrochemical, renewable energy and various other industrial applications. Its fluid conveyance system products include high- and low-pressure ducting systems; bellows, gimbals, flexible joints and couplings; control bellows, sensors and assemblies; thermal management solutions, including metallic insulation and electronics cooling plates; and high-pressure hydraulic fittings and fuel fittings, as well as gas turbine engines comprising fluid systems ducting and control products. The company also provides land vehicle emission control and propulsion, such as exhaust gas recirculation coolers, fuel mixing and distribution components, exhaust flex connectors, flexible couplings, battery thermal management systems and cooling plates, power electronics cooling, common rails, and various fluid conveyance systems for heavy-duty vehicles. In addition, it offers industrial process control which includes engineered expansion joints, dampers and diverters; flexible hose assemblies and control bellows; fuel cell components and heat exchangers; and precision-machined components for oil and gas drilling applications. Senior plc was formerly known as Senior Engineering Group plc and changed its name to Senior plc in May 1999. Senior plc was founded in 1836 and is based in Rickmansworth, the United Kingdom. As of October 8, 2026, Senior plc was taken private.
