- National Engineering
 - Mechanical, electrical, plumbing, and technology design firm specialising in education, healthcare, school, and industrial projects. - S.E.A., Inc.
- Forensic engineering including investigation, accident reconstruction, mechanical engineering, failure analysis, and insurance claims.
- Civil Engineering
- BBCM Engineering
- Providing geotechnical engineering, geodesign, construction observation, materials testing, and environmental services in Columbus, Cleveland, Cincinnati, and Dayton, Ohio.
- Environmental@
- Superconductive Components Inc.@
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