- Arcade Electronics, Inc.
 - Alexandria - Supplier of fibre optics, industrial electronics, and cable. Wide range of products supporting the fibre optic and electronics industry. - D. C. Connections, Inc.
- Sterling - Distributor of fibre optic and copper cable communications products.
- Greenway Crane
- Offers a full range of modern hydraulic cranes in the 14 to 175 ton range.
- Hoppmann Corporation
- Chantilly - Designs and manufacturers automated packaging equipment, feeders, prefeeders, conveyors/accumulators continuous motion assembly systems.
- Society of the Plastics Industry, Inc.
- Principal trade association for the U.S. plastics industry.
- Sonix, Inc.
- Springfield - Specializing in nondestructive testing of materials using ultrasound. Also build A/D boards, motor controllers, pulser/receivers, and complete immmersion tank scanning systems.
- Ventex
- Reston - Specialists in firebarriers, healthcare & university housing ticking.
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