| Business | Phone |
| 4th Dimension Design Inc 2825 N Mayfair Rd # 206, Milwaukee 53222 | (414) 475-7531 |
| Michael A Corrigan Pe 105 N Water St # 200, Milwaukee 53202 | (414) 615-2300 |
| Matrix Engineering Milwaukee 53223 | (414) 586-0660 |
| Strass-Maguire & Assoc Inc 9064 N Deerbrook Trl, Milwaukee 53223 | (414) 354-4046 |
| Pujara Wirth Torke Inc 933 N Mayfair Rd 300, Milwaukee 53226 | (414) 453-4556 |