| Business | Phone |
| Infra Designs 1234 Alta Mesa Blvd, Brownsville 78526 | (956) 592-0477 |
| L & S Supervisory Engrg Inc 3505 Boca Chica Blvd 312, Brownsville 78521 | (956) 831-7979 |
| Plagar Engineering Llc 914 W Price Rd, Brownsville 78520 | (956) 550-9995 |
| Corona Engineering & Surveying 654 W Saint Charles St, Brownsville 78520 | (956) 541-3222 |