| Business | Phone |
| Bass Nixon & Kennedy Engineers 6310 Chapel Hill Rd # 250, Raleigh 27607 | (919) 851-4422 |
| Southeastern Engineering Assoc 2700 Wycliff Rd # 102, Raleigh 27607 | (919) 781-2880 |
| Hvac Systems 5104 Buffaloe Rd, Raleigh 27616 | (919) 876-7972 |
| Partners Mechanical Svc 3404 Paddock Cir, Raleigh 27613 | (919) 846-9448 |