Technology Companies

Company  County Number of employees Service
DeRoyal Industries Knox  764 Medical device manufacturing
Siemens Healthcare  Knox 534 Clinical imaging, preclinical and biomarker solutions
Radio Systems Corp. Knox 340 Pet products: PetSafe, Invisible Fence Brand, SportDOG
PerfectServe Knox 172 Unified communications platform that connects clinicians in any care setting
Aqua-Chem Knox 150 Water purification technologies
United Flexible Knox 147 Hydro formed metal bellows and welded assemblies; thermostatic actuators and diaphragms
Electric Power Research Institute (EPRI) Knox 140 Technology solutions that enable the transformation of power systems to be more flexible, resilient and connected.
Emerson Automation Solutions-Reliability Solutions Knox 138 Development of software/hardware products for predictive/protective maintenance and vibration analysis equipment
Protomet Anderson 135 Products developed specifically for the marine industry 
Centrus Technical Solutions Anderson 106 Provides technical solutions for the engineering, development, prototyping and manufacturing of complex engineered products
Uster Technologies Knox 100 Design, manufacture, install precision measuring instruments used for quality measurement and certification for the textile industry
ProNova Solutions Knox 95 Proton therapy treatment systems
ProNova Solutions Blount 95 Compact, accessible proton therapy system
Northrop Grumman Remotec Anderson 90 Manufactures mobile robotic systems for inspecting and defusing explosives and other hazardous duty operations
AESSEAL Inc. Blount 87 Design, manufacture of mechanical seals and seal support systems
Analysis and Measurement Services Corp. (AMS) Knox 75 Qualifying the instrumentation and control systems of nuclear power plants through laboratory and in-plant testing services and specialized testing equipment and advanced monitoring technologies
Cryomagnetics Anderson 65 Design and development of superconducting magnets, cryogenic systems, control electronics
MS Technology Anderson 61 Microwave industrial heating equipment including metal melting/casting furnaces and fluidized bed heat treating equipment
Proton Power Loudon 60 Manufactures a patented renewable energy system that utilizes renewable biomass and waste sources to generate electricity, heat, synthetic fuels, hydrogen
Technology for Energy Corp. Knox 55 Aircraft and helicopter on-the-wing ground support equipment, equipment for electric power metering, power quality, revenue protection of the electric power industry, monitoring equipment for nuclear power plants, X-ray diffraction analyzers 
Perceptics Knox 52 Automatic license plate readers and other vehicle recognition equipment
Bandit Lites Knox 52 LED lighting fixtures for the entertainment industry

Source:  Book of Lists, community websites 2019