| Business | Phone |
| Buell Winter Mousel & Assoc 705 Douglas St 636, Sioux City 51101 | (712) 258-4202 |
| Dewild Grant Reckert & Assoc 4425 Singing Hills Blvd 300, Sioux City 51106 | (712) 266-1554 |
| Rose Enginering 401 Douglas St # 413, Sioux City 51101 | (712) 258-1904 |
| Steffen Engineering & Testing 611 5th St, Sioux City 51101 | (712) 277-3017 |