| Business | Phone |
| Aggi Ltd Llc 6850 Cochran Rd, Cleveland 44139 | (440) 349-5100 |
| Analex 3001 Aerospace Pkwy, Cleveland 44142 | (216) 977-0000 |
| Bbc & M Engineering 8555 Sweet Valley Dr, Cleveland 44125 | (216) 901-1000 |
| Whitworth Borta 20545 Center Ridge Rd # 450, Cleveland 44116 | (440) 895-0465 |
| Vee Engineering Inc 2205 Fallen Oaks, Cleveland 44145 | (440) 333-4912 |
| Colton Engineer 1276 W 3rd St, Cleveland 44113 | (216) 241-2531 |
| United Engineering Assoc 2400 Superior Ave E # 2400, Cleveland 44114 | (216) 344-0060 |
| Triad Engineering & Contr 21403 Chagrin Blvd, Cleveland 44122 | (216) 751-5544 |
| Diamond Z Engineering 981 Keynote Cir, Cleveland 44131 | (216) 749-0213 |
| Superior Technical Solutions 9331 Lindbergh Blvd, Cleveland 44138 | (440) 235-4440 |
| Spalding Dedecker Assoc 600 Superior Ave E # 1300, Cleveland 44114 | (216) 902-5015 |
| Evan's Mold Engineering Inc 28515 Stonegate Cir, Cleveland 44145 | (440) 899-1016 |
| Snp Design Engineering Svc 9107 Highland Dr, Cleveland 44141 | (440) 546-0429 |
| Hmf Engineering 5111 W 164th St, Cleveland 44142 | (216) 267-6124 |
| Hoffman Engineering 4877 Galaxy Pkwy, Cleveland 44128 | (440) 498-1320 |
| Northrop Grumman Info Tech 2001 Aerospace Pkwy, Cleveland 44142 | (216) 925-1000 |
| Linea Engineering 3401 Enterprise Pkwy, Cleveland 44122 | (216) 766-5716 |
| Msa Technologies 17957 Saratoga Trl, Cleveland 44136 | (216) 215-8246 |
| Mace Engineering Inc 26700 Renaissance Pkwy # 5, Cleveland 44128 | (216) 593-0171 |
| Materials Oxford Engineering 20950 Center Ridge Rd, Cleveland 44116 | (440) 356-3426 |