| Business | Phone |
| Lothringer Engineering 1320 Arrow Hwy, La Verne 91750 | (909) 596-4076 |
| Brutoco Engineering & Constr La Verne 91750 | (909) 596-8377 |
| Engineering & Technology Group 1945 Rosewood St, La Verne 91750 | (909) 596-7831 |
| Jason Industry Usa 7408 Alta Vis, La Verne 91750 | (909) 596-5143 |