| Business | Phone |
| Levingston Engineers Inc 510 S Cities Service Hwy, Sulphur 70665 | (337) 527-3806 |
| Meyer & Assoc 600 N Cities Service Hwy, Sulphur 70663 | (337) 625-8353 |
| Professional Consulting Engnrs 1215 S Post Oak Rd # 4, Sulphur 70663 | (337) 625-8981 |
| Recon Management & Engineering 3649 S Beglis Pkwy, Sulphur 70665 | (337) 583-4662 |