| Business | Phone |
| Geo Systems Kleinfelder 9312 G Ct, Omaha 68127 | (402) 331-2260 |
| Terracon Consultants Inc 2211 S 156th Cir, Omaha 68130 | (402) 330-2202 |
| Psi 2917 Douglas St, Omaha 68131 | (402) 341-5181 |
| In-Situ Geo Technical Engrg 4722 S 135th St, Omaha 68137 | (402) 614-6957 |