| Business | Phone |
| Adam Streeter Civil Engr 2900 Adams St, Riverside 92504 | (951) 352-4100 |
| Adkan Engineers 6820 Airport Dr, Riverside 92504 | (951) 688-0241 |
| Albert A Webb Assoc 3788 Mccray St, Riverside 92506 | (951) 686-1070 |
| Canty Engineering Group Inc 2010 Iowa Ave # 110, Riverside 92507 | (951) 683-5234 |
| Cornerstone Group 1485 Spruce St # H, Riverside 92507 | (951) 342-0036 |
| Engineering Solutions 1465 Spruce St, Riverside 92507 | (951) 784-0286 |
| Gabel Cook & Assoc 125 W La Cadena Dr # A, Riverside 92501 | (951) 788-8092 |
| Gfb Friedrich & Assoc Inc 6529 Riverside Ave # 230, Riverside 92506 | (951) 781-0811 |
| Hunsaker & Assoc Inc 2900 Adams St # A15, Riverside 92504 | (951) 352-7200 |
| Krieger & Stewart 3602 University Ave, Riverside 92501 | (951) 684-6900 |
| Psomas 1700 Iowa Ave # 160, Riverside 92507 | (951) 787-8421 |
| A-1 Surveying Co Inc 231 E Alessandro Blvd, Riverside 92508 | (951) 351-1029 |
| Archer Engineering Riverside 92503 | (951) 352-8921 |
| Engineering Resources Center 17906 Corinne Way, Riverside 92504 | (951) 776-1515 |
| Jensen & Assoc 1487 Woodvale Ln, Riverside 92506 | (951) 780-1829 |
| Martin Rom & Assoc 3600 Lime St # 322, Riverside 92501 | (951) 786-0004 |
| Rha Engineering Inc 6974 Brockton Ave # 100, Riverside 92506 | (951) 683-8088 |
| Richards & Wilkes Land 6529 Riverside Ave # 115, Riverside 92506 | (951) 276-8010 |
| Woodcrest Engineering 15790 Rancho Viejo Dr, Riverside 92506 | (951) 780-2843 |
| Pacific Engineering Group 5225 Canyon Crest Dr, Riverside 92507 | (951) 780-1221 |
| Rick Engineering Co 1223 University Ave # 240, Riverside 92507 | (951) 782-0707 |
| Southland Engineering 2200 Business Way # 100, Riverside 92501 | (951) 788-8488 |