| Business | Phone |
| Alliance Environmental Group 124 Mount Auburn St # 200, Cambridge 2138 | (617) 492-6500 |
| Ariano Technologies Inc 189 Upland Rd, Cambridge 2140 | (617) 661-6110 |
| Blazetech Corp 24 Thorndike St, Cambridge 2141 | (617) 661-0700 |
| Camp Dresser & Mckee Inc 50 Hampshire St, Cambridge 2139 | (617) 452-6000 |