- Carpco Inc.
 - Jacksonville - Engineering and equipment manufacturing for the alluvial/mineral sands industry. Specialises in separation technology. - Fred Wilson & Associates, Inc.
- Jacksonville - Specialties including design for roadway, bridge, site development, electrical power distribution, and industrial electrical projects.
- Sunbelt Engineering, Inc.
- Jacksonville - Medium-sized consulting firm with experience in mechanical engineering, building automation, building commissioning, and construction management.
- Civil Engineering
- B. Robinson Corporation
- Jacksonville - Licensed structural engineering, civil engineering, construction and related services company that is state certified as a minority business enterprise (MBE).
- Bessent, Hammack and Ruckman, Inc.
- Jacksonville - Specialising in civil, transportation, and environmental engineering; planning, landscape architecture, and surveying.
- Prosser Hallock, Inc.
- Jacksonville - A professional planning, engineering, and landscape architectural firm.
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