| Business | Phone |
| World Water Watch Cambridge 2138 | (617) 492-1011 |
| Xcitex 432 Columbia St # 15, Cambridge 2141 | (617) 225-0080 |
| Zaldastani Assoc Inc 130 Bishop Richard Allen Dr, Cambridge 2139 | (617) 864-4040 |
| V P Engineering 675 Massachusetts Ave # 3, Cambridge 2139 | (617) 520-9555 |
| Urs Corp 5 Cambridge Ctr, Cambridge 2142 | (617) 871-6593 |
| Arup 955 Massachusetts Ave # 402, Cambridge 2139 | (617) 864-2987 |
| Transitions Group Inc 950 Massachusetts Ave, Cambridge 2139 | (617) 441-9100 |
| Tec Svc 6 Hawthorne Park, Cambridge 2138 | (617) 576-9470 |
| Syska & Hennessy Inc 1 Broadway, Cambridge 2142 | (617) 577-9900 |
| Brattle Group 44 Brattle St # 3, Cambridge 2138 | (617) 864-7900 |
| Sneakerfish 20 Sacramento Pl, Cambridge 2138 | (617) 864-0501 |
| G B Engineering 353 Broadway, Cambridge 2139 | (617) 876-0390 |
| Mc Phail Associates Inc 30 Norfolk St # 3, Cambridge 2139 | (617) 868-1420 |
| Sea Consultants 485 Massachusetts Ave, Cambridge 2139 | (617) 497-7800 |
| Cambridge Consultant Engineers 602 Green St, Cambridge 2139 | (617) 661-1100 |
| Cambridge Systematics Inc 100 Cambridgepark Dr # 400, Cambridge 2140 | (617) 354-0167 |
| Rene Mungier Assoc 777 Concord Ave, Cambridge 2138 | (617) 547-7773 |
| Collabrative For Development 130 Prospect St, Cambridge 2139 | (617) 661-6310 |
| Cosentini Associates 1 Broadway, Cambridge 2142 | (617) 494-9090 |
| Optima 124 Mount Auburn St # 200n, Cambridge 2138 | (617) 576-5860 |
| Otolith 25 Fairmont Ave # 3, Cambridge 2139 | (617) 868-6270 |
| M L Dee & Assoc Inc 129 Mount Auburn St # 3, Cambridge 2138 | (617) 661-1465 |
| Magavi Consulting Group 515 Putnam Ave # 3, Cambridge 2139 | (617) 491-1128 |
| Horton International Inc 238 Main St # 304, Cambridge 2142 | (617) 491-6005 |