| Business | Phone |
| 1028 Van Buren Assoc Lp 1030 W Van Buren St, Chicago 60607 | (312) 492-8869 |
| A Alert Security Svc 4337 W Madison St, Chicago 60624 | (773) 487-7854 |
| Aargus Security Systems Inc 4047 W 40th St, Chicago 60632 | (773) 376-6700 |
| Abm Security Svc 222 S Riverside Plz # 880, Chicago 60606 | (312) 466-1800 |
| Addison & Assoc Security Ltd 4352 W Shakespeare Ave, Chicago 60639 | (773) 862-2590 |
| Agb Investigative Svc 2445 W 71st St, Chicago 60629 | (773) 476-8310 |
| Akal Security 28 E Jackson Blvd 1103, Chicago 60604 | (312) 291-0578 |
| Allied Security 500 N Michigan Ave # 1810, Chicago 60611 | (312) 436-9000 |
| Allpoints Security 2112 E 71st St, Chicago 60649 | (773) 955-6700 |
| American Security Svc Inc Chicago 60638 | (773) 586-6666 |
| Anatasia Massie & Assoc 326 E 76th St, Chicago 60619 | (773) 873-1040 |
| Andy Frain Svc 350 N Orleans St, Chicago 60654 | (312) 755-1701 |
| Global Protection Assoc Inc 3501 E 106th St 206, Chicago 60617 | (773) 978-0002 |
| General Security Svc Corp 230 S Dearborn St, Chicago 60604 | (312) 588-0730 |
| Genesis Security Inc 20 E Jackson Blvd 1400, Chicago 60604 | (312) 431-9601 |
| Genesis Security Inc 2941 S Michigan Ave # 508, Chicago 60616 | (312) 808-9815 |
| Bgk Security 348 N Ashland Ave, Chicago 60607 | (312) 942-0815 |
| Bgk Security Svc Inc 7810 S Claremont Ave, Chicago 60620 | (773) 436-3788 |
| Steve Dick & Associates 3501 N Southport Ave, Chicago 60657 | (773) 588-2605 |
| Body Guard Inc 3350 W Bryn Mawr Ave, Chicago 60659 | (773) 509-9911 |
| Brinks Inc 5 S Wabash Ave 215, Chicago 60603 | (312) 759-2723 |
| Browder's Maximum Security Svc 2100 S Indiana Ave 108, Chicago 60616 | (312) 225-7900 |
| Ford City Security 7601 S Cicero Ave, Chicago 60652 | (773) 767-1075 |
| Flagg Security Inc 9412 S Wabash Ave, Chicago 60619 | (773) 660-1700 |
| National K-9 Security 2916 W Lake St, Chicago 60612 | (773) 722-7070 |
| Execprotect Inc Chicago 60643 | (773) 445-6400 |
| Executive Protection Security Chicago 60625 | (773) 878-7600 |
| Cbs Security Inc 10340 S Western Ave, Chicago 60643 | (773) 779-7275 |
| Central Watch Svc 214 W Ohio St, Chicago 60610 | (312) 360-4180 |
| Cequr Security Llc 2532 W Warren Blvd, Chicago 60612 | (312) 491-1227 |
| Emerald Security 8539 S Pulaski Rd, Chicago 60652 | (773) 582-6374 |
| Eastern Maintenance & Svc Inc 527 S Wells St, Chicago 60607 | (312) 427-5524 |
| Digby's Detective & Security 2630 S Wabash Ave, Chicago 60616 | (312) 326-1100 |
| Dignitary Protective Svc 8456 S Lafayette Ave, Chicago 60620 | (773) 874-8055 |
| Dignitary Protective Svc 9901 S Western Ave # 204, Chicago 60643 | (773) 298-1974 |
| Citywide Security Group 3520 W Carmen Ave, Chicago 60625 | (773) 588-1642 |
| De Leon Consultants Inc 1310 N Kedzie Ave, Chicago 60651 | (773) 862-1447 |
| Cognisa Security 5519 N Cumberland Ave 1016, Chicago 60656 | (773) 631-4141 |
| Community Based Safety 2818 W Arthington St, Chicago 60612 | (773) 265-1074 |
| Danmark Security 120 W Madison St 618, Chicago 60602 | (312) 658-1300 |
| D H Protective Security 8154 S Ingleside Ave, Chicago 60619 | (773) 488-8610 |
| Command Security Corp 8452 S Stony Island Ave, Chicago 60617 | (773) 734-2369 |
| Cops Inc Off Duty 6525 N Nashville Ave, Chicago 60631 | (773) 775-6000 |
| Corporate Security Consultants 3256 W 47th St, Chicago 60632 | (773) 927-0024 |
| Gold Star Securities 664 S Clark St, Chicago 60605 | (312) 566-9221 |