Castlo Community Improvement Corporation
- A nonprofit organization founded for the purpose of attracting industry and prospective employers to the Mahoning Valley region. Also manages the Castlo industrial park.
- http://www.castlo.com/yeah

Materials Research Laboratories Inc.
- Research and development laboratory specializing in surface and interface analysis and microscopy.
- http://www.mrllab.com/

Spectrochemical Testing Inc.
- Company offers chemical, physical, and metallurgical testing for industry.
- http://www.spectrochemical.com/

Astro Shapes Inc.
- Manufactures, distributes and paints aluminum extrusions.
- http://www.astroshapes.com/

Aluminum Fence and Mfg. Co.
- Specializing in aluminum chain link fence, gates, fence accessories, and barb wire.
- http://www.aluminumfencemfg.com/

Higgins Online Inc.
- Provides web site services for single store to large franchise organizations.
- http://www.higginsonline.com/