| Business | Phone |
| 5 D Systems 5151 Research Dr Nw # C, Huntsville 35805 | (256) 837-8236 |
| Alabama Cryogenic Engineering Po Box 2470, Huntsville 35804 | (256) 536-8629 |
| Arcata Associates Inc 1019 Claude Cir Nw, Huntsville 35806 | (256) 837-5331 |
| Arinc Inc 7047 Old Madison Pike Nw # 320, Huntsville 35806 | (256) 922-1022 |
| Bae Systems 1525 Perimeter Pkwy Nw # 500, Huntsville 35806 | (256) 890-8000 |
| Dms Technology 1703 Drake Ave Se, Huntsville 35802 | (256) 881-6520 |
| Jmr Engineering Po Box 12057, Huntsville 35815 | (256) 852-6585 |
| Johnson Controls 4940 Corporate Dr Nw # C, Huntsville 35805 | (256) 217-2800 |
| K T Engineering 4900 University Sq, Huntsville 35816 | (256) 489-5832 |
| Optical Etc Inc 3077 Leeman Ferry Rd Sw, Huntsville 35801 | (256) 880-8207 |
| Pentar Inc 3054 Leeman Ferry Rd Sw # J, Huntsville 35801 | (256) 881-8487 |
| Qtec Inc 2707 Artie St Sw # 4 # 300, Huntsville 35805 | (256) 883-7994 |
| Raytheon Co Field Engineering Redstone Arsenal, Huntsville 35803 | (256) 882-0463 |
| Sabek Technology Inc 2209 Swaim Cir Nw, Huntsville 35810 | (256) 651-3777 |
| Secotec Inc 4935 Century St Nw, Huntsville 35816 | (256) 722-0000 |