| Business | Phone |
| Design Management Assoc 1300 Penn Ave Nw # 700, Washington 20004 | (202) 452-7860 |
| Brandes & Cassagnol 1411 K St Nw # 830, Washington 20005 | (202) 393-1360 |
| Cutts & Assoc 2000 L St Nw # A40, Washington 20036 | (202) 822-8222 |
| K Karayianis Pe 2919 Tennyson St Nw, Washington 20015 | (202) 966-6687 |
| Kce Structural Engineers 1818 Jefferson Pl Nw, Washington 20036 | (202) 833-8622 |
| Robert Silman Assoc 1053 31st St Nw, Washington 20007 | (202) 333-6230 |
| Smislova Kehnemui & Assoc 1709 N St Nw, Washington 20036 | (202) 659-2520 |
| Spiegel Zamecnik Inc 1900 L St Nw, Washington 20036 | (202) 223-9500 |
| Thornton Tomasetti Group 2000 L St Nw # 800, Washington 20036 | (202) 466-8060 |