| Business | Phone |
| Applied Testing Consultants 3060 Thorntree Dr # 10, Chico 95973 | (530) 891-6625 |
| Holdredge & Kull 1250 East Ave # 24, Chico 95926 | (530) 894-2487 |
| Kennedy Jenks Consultants 180 E 4th St # 500, Chico 95928 | (530) 891-9293 |
| Makel Engineering Inc 1575 Marauder St, Chico 95973 | (530) 895-2770 |
| Urs Corp 1550 Humboldt Rd # 2, Chico 95928 | (530) 893-9675 |
| Vertech Structural Engineering 383 Rio Lindo Ave, Chico 95926 | (530) 899-8716 |
| Daniel J Dobbie Pe 20 Mayfair Dr, Chico 95973 | (530) 345-4743 |
| Koty Engineering Po Box 4390, Chico 95927 | (530) 898-9810 |
| Practical Products 1061 E 8th St, Chico 95928 | (530) 343-5185 |
| Makel Engineering Inc 1585 Marauder St, Chico 95973 | (530) 895-2770 |