- Lawrence Ripak Co.
 - West Babylon - Nondestructive testing and finishing house for the aircraft industry. - Lencore Acoustics Corp.
- Merrick - Manufacturers of acoustical wall panels and sound masking systems for the office environment.
- Soundcoat
- Deer Park - Supplier of noise control materials and parts.
- Testing Machines Inc.
- Islandia - Manufactures test instruments and data acquisition software to measure adhesion, colour, compression, friction, thickness, smoothness, stress-strain, and other physical properties
- V.J. Technologies, Inc.
- Bohemia - Industrial x-ray systems for inspection of castings, welds, tyres, composite materials, food, medicine, radioactive waste drums and boxes, new applications.
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