| Business | Phone |
| Barry Security Inc 101 Constitution Ave Nw, Washington 20001 | (202) 789-0170 |
| Ardent Security Svc 2900 V St Ne, Washington 20018 | (202) 529-5134 |
| Center For Natl Security Stds 1120 19th St Nw, Washington 20036 | (202) 721-5650 |
| Center For Natl Security Stds 2130 H St Nw, Washington 20037 | (202) 994-7060 |
| Center For Security Studies 1521 16th St Nw, Washington 20036 | (202) 265-3715 |
| Emergency Security Nine Eleven 421 H St Ne # A, Washington 20002 | (202) 546-4200 |
| Asi Div Of Tenn Security 11910-T Parklawn Dr, Washington 20016 | (202) 966-0279 |
| Global Security Institute 110 Maryland Ave Ne, Washington 20002 | (202) 543-9017 |
| Guardsmark Inc 1730 Rhode Island Ave Nw #1215, Washington 20036 | (202) 887-5355 |
| Ideal Electrical Supply Corp 2900 V St Ne, Washington 20018 | (202) 526-7500 |
| Kingdom Security Svc 601 Edgewood St Ne, Washington 20017 | (202) 636-5700 |
| Park Place Condominium Gate Hs 3129 Hawthorne Dr Ne, Washington 20017 | (202) 483-8674 |
| Rapiscan Security Products Inc Washington National Airport, Washington 20001 | (703) 416-9571 |
| National Biometric Security 601 13th St Nw, Washington 20005 | (202) 347-9788 |
| Parker Security Inc 1405 H St Ne, Washington 20002 | (202) 399-5000 |
| Quality Security Svc Inc 300 I St Ne, Washington 20002 | (202) 547-0930 |
| Security Trust Co 1501 Pennsylvania Ave Nw, Washington 20005 | (202) 624-4158 |
| Vision Security 331 H St Ne, Washington 20002 | (202) 544-7341 |