| Business | Phone |
| Arrowhead Engineering 1655 Arrowhead Dr, Oakland 94611 | (510) 339-7269 |
| Bioengineering Group 6573 Shattuck Ave, Oakland 94609 | (510) 594-8162 |
| Bracewell Engineering Inc 6239 College Ave # 202, Oakland 94618 | (510) 547-8205 |
| Conseil Engineering 2009 Magellan Dr, Oakland 94611 | (510) 531-6107 |
| Coverall Engineering Inc 981 66th Ave, Oakland 94621 | (510) 568-4800 |
| Flory Engineers Oakland 94612 | (510) 986-9076 |
| Mactec Engineering 600 Grand Ave, Oakland 94610 | (510) 628-3227 |
| Multimodal Engineering Corp 2500 7th St, Oakland 94607 | (510) 836-4990 |
| Quality Engineering Inc 417 Harrison St, Oakland 94607 | (510) 433-0630 |
| S C Solutions 1330 Broadway # 907, Oakland 94612 | (510) 419-0367 |
| Tudor Engineering Co 1800 Harrison St, Oakland 94612 | (510) 419-6100 |