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• SATIR Trade UK Co Limited
• School of Architecture, Design and Environment, Plymouth University
• School of Science and Technology, University of Northampton
• Scot-Test Ltd
• Sellafield Ltd
• SENTINEL/QSA Global Inc
• Sercal NDT Equipment Ltd
• Servtech Ltd
• SGS Group Management Ltd
• Shantou Institute of Ultrasonic Instruments Co Ltd (SIUI)
• Shaw Pipeline Services – a division of Shawcor UK Ltd
• Silverwing UK Ltd
• Sonaspection International Limited
• Sonatest Ltd
• Sonaxis SA
• Sonomatic Ltd
• Sonomatic Ltd
• Sonovation
• Spectro Analytical UK Ltd
• SPI Matrix Limited
• ST Aerospace Services
• Stork Technical Services
• STROMA