| Business | Phone |
| Admicro 111 Franklin Rd Sw 110, Roanoke 24011 | (540) 527-4600 |
| Albertus Engineering Inc 7629 Williamson Rd, Roanoke 24019 | (540) 366-5591 |
| Burrow Corp Of Roanoke 101 S Jefferson St, Roanoke 24011 | (540) 342-3922 |
| Sigma Engineering & Plann 4303 Appleton Ave Nw, Roanoke 24017 | (540) 562-1386 |
| Tnc Engineering 1326 Grandin Rd Sw, Roanoke 24015 | (540) 343-6910 |
| Engineering Concepts Inc 3433 Brambleton Ave 200b, Roanoke 24018 | (540) 776-5715 |