Technology Companies

Company  County Number of employees Service
Radio Systems Corp. Knox 494 Pet products: PetSafe, Invisible Fence Brand, SportDOG
Siemens Healthcare  Knox 457 Clinical imaging, preclinical and biomarker solutions
DeRoyal Industries Knox  400 Medical device manufacturing
Bandit Lites Knox 300 LED lighting fixtures for the entertainment industry
Protomet Anderson 250 Products developed specifically for the marine industry 
ProNova Solutions Knox 200 Proton therapy treatment systems
Aqua-Chem Knox 165 Water purification technologies
AESSEAL Inc. Blount 150 Design, manufacture of mechanical seals and seal support systems
PerfectServe Knox 150 Unified communications platform that connects clinicians in any care setting
Electric Power Research Institute (EPRI) Knox 131 Technology solutions that enable the transformation of power systems to be more flexible, resilient and connected.
Fulton Bellows Knox 115 Hydro formed metal bellows and welded assemblies; thermostatic actuators and diaphragms
Centrus Technical Solutions Anderson 106 Provides technical solutions for the engineering, development, prototyping and manufacturing of complex engineered products
Vacuum Technology Incorporated (VTI) Anderson 80 Calibrated Leaks and vacuum leak testing systems 
Analysis and Measurement Services Corp. (AMS) Knox 70 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
Emerson Process Management Knox 68 Development of software/hardware products for predictive/protective maintenance and vibration analysis equipment
Northrop Grumman Remotec Anderson 68 Manufactures mobile robotic systems for inspecting and defusing explosives and other hazardous duty operations
Cryomagnetics Anderson 65 Design and development of superconducting magnets, cryogenic systems, control electronics
Uster Technologies Knox 60 Design, manufacture, install precision measuring instruments used for quality measurement and certification for the textile industry
Perceptics Knox 60 Automatic license plate readers and other vehicle recognition equipment
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 
MS Technology Anderson 53 Microwave industrial heating equipment including metal melting/casting furnaces and fluidized bed heat treating equipment
Cubic Transportation Systems/GRIDSMART  Knox 38 Traffic management system deploying proprietary technology and software.
Proton Power Loudon 34 Manufactures a patented renewable energy system that utilizes renewable biomass and waste sources to generate electricity, heat, synthetic fuels, hydrogen

Source:  Book of Lists, community websites 2023