- Accurate Tool Co., Inc.
- Advanced Scientific
- All Metals Fabricators
- Anderson-Bowen Industrial Equipment Co., Inc.
- Aker American Shipping, Inc.
- Black & Decker Co.
- Brenner Tool and Die, Inc.
- Chalmers & Kubeck, Inc.
- Chowns Fabrication & Rigging
- CITI Steel USA Inc.
- ConocoPhillips Co.
- Cressona Aluminum Co.
- Dauphin Graphic Machines, Inc.
- Dechert Dynamics Corporation
- E. I. du Pont de Nemours and Co.
- East Coast Cycle Center, Inc.
- Eaton Aerospace
- Elliott Machine Works, Inc.
- Exelon Corporation
- FDI-Berg Electronics
- Florida Power & Light Co.
- Flowserve Corporation
- GAM Manufacturing Co.
- General Physics Corp.
- GETRAG Corporate Group
- H&H Disposal Co.
- International Material Control Systems, Inc.
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- Kennametal Industrial Product Group
- Kline Machinery, Inc.
- Koenig Engineering, Inc.
- Lenape Forged Products, Corp.
- Marble Crafters USA
- Metal Industries, Inc.
- Northrop Gruman Corporation
- Packaging Technologies
- Phillips
- PoolPak Technologies Corporation
- Potts Welding & Boiler Repair Co., Inc.
- Progress Energy
- John Prosock Machine, Inc.
- Reliant Energy
- Richmond Screw Anchor Co.
- Ruby Machine & Tool & Die
- Siemens AG
- Self-Employed
- F.L. Smithe Machine Co., Inc.
- Southco
- Sumatech
- Synthes, Inc.
- Tura Machine Corp.
- Waukesha Bearing Corporation
- White's Machine, Inc.
- Williams Bridge Co.
- Xynatech, Inc.
- Zemco Manufacturing, Inc.
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