| Business | Phone |
| H E Raywinkle & Assoc 910 Doyle St, Longview 75601 | (903) 758-7233 |
| Ksa Engineers Inc 140 E Tyler St # 600, Longview 75601 | (903) 236-7700 |
| Landmark Consultants Inc 1015 Northwest Dr # 8, Longview 75604 | (903) 236-3377 |
| Blackaller Engineering 2810 Bill Owens Pkwy # 200, Longview 75605 | (903) 759-5048 |
| Collins Surveyoring & Mapping 910 Judson Rd # A, Longview 75601 | (903) 234-8051 |
| Surveying Professionals 1509 Martha Dr, Longview 75601 | (903) 236-4925 |
| Roberts Surveying Co 180 Private Road 3461, Longview 75602 | (903) 758-7876 |
| Msm Matthews Surveying & Map 1011 W Loop 281 # 10, Longview 75604 | (903) 663-7663 |