- Barr Engineering Company
 - Provides solutions in engineering, environmental, and information technology. - Bonestroo, Rosene, Anderlik & Associates, Inc. (1)
- Environ Laboratories Inc.
- Independent testing facility performing environmental and mechanical tests for the aerospace, telecommunications, biomedical and military industries.
- Forward Technology Industries, Inc.
- Manufacturers of precision cleaning equipment, plastic welding equipment, and leak testers.
- Materials Evaluation and Engineering, Inc.
- Independent materials laboratory.
- Sebesta Blomberg & Associates, Inc.
- Engineering consultants.
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