| Business | Phone |
| Bertco Engineering 719 Sawdust Rd, Spring 77380 | (281) 364-9786 |
| Bertco Engineering Svc Inc 719 Sawdust Rd, Spring 77380 | (281) 364-9784 |
| Da Vogt Engineering Inc 1544 Sawdust Rd, Spring 77380 | (281) 367-0947 |
| Dts Engineering 719 Sawdust Rd # 214, Spring 77380 | (281) 298-8877 |
| Energistix Inc 25025 Interstate 45, Spring 77380 | (281) 362-0300 |
| Red Chute Engineering 4200 Research Forest Dr, Spring 77381 | (281) 367-0059 |
| Tandy Engineering & Assoc Inc 25003 Pitkin Rd, Spring 77386 | (281) 363-0888 |
| Engineering Innotech 18 Fair Light Ct, Spring 77382 | (281) 465-8474 |
| Geothermal Advantage Inc 23819 Spring Gum Dr, Spring 77373 | (281) 353-1488 |
| Linear Logic 17219 Chaseloch St, Spring 77379 | (281) 370-1442 |