| Business | Phone |
| A I Engineers Inc 100 W 32nd St, New York 10001 | (212) 760-2423 |
| Egis Inc 250 Park Ave S, New York 10003 | (212) 460-9090 |
| Gannett Fleming Inc 250 W 34th St # 2222, New York 10119 | (212) 967-9833 |
| K C Engineering 370 7th Ave # 1705, New York 10001 | (212) 947-4945 |
| Lichtenstein Engineering Assoc 350 5th Ave # 2920, New York 10118 | (845) 294-3555 |
| Sauer Corp 233 Broadway # 743, New York 10279 | (212) 542-2464 |
| Parsons Brinckerhoff Inc 1 Penn Plz # 2, New York 10119 | (212) 465-5000 |