| Business | Phone |
| Andre Peden 4550 N Clarendon Ave, Chicago 60640 | (773) 528-0246 |
| Chi Star Security 10540 S Western Ave, Chicago 60643 | (773) 238-5000 |
| Msi-Mc Coy Security Inc 20 E Jackson Blvd 1400, Chicago 60604 | (312) 322-4900 |
| Midwest Security Agency 1507 S State St, Chicago 60605 | (312) 842-7033 |
| Twentieth Century Svc Inc 1033 W Van Buren St, Chicago 60607 | (312) 850-2436 |
| Security Management Group 1824 W Pershing Rd, Chicago 60609 | (773) 254-1824 |
| Levy Security Corp 230 E Ohio St 7, Chicago 60611 | (312) 649-9204 |
| Statewide Guard & Invstgtv Svc 2041 W Carroll Ave 221, Chicago 60612 | (312) 942-1222 |
| Universal Security Inc 1640 N Wells St, Chicago 60614 | (312) 642-7447 |
| Digby's Alarm Svc 2630 S Wabash Ave, Chicago 60616 | (312) 842-3028 |
| Task Force Security Inc 7917 S Exchange Ave 205, Chicago 60617 | (773) 375-1388 |
| Great Lakes Maintenance Corp 8734 S Cottage Grove Ave, Chicago 60619 | (773) 994-1899 |
| Star Detective & Security 813 E 75th St, Chicago 60619 | (773) 874-1900 |
| Psi Security Svc 9415 S Western Ave, Chicago 60620 | (773) 429-1900 |
| Sherman B Williams Invstgtn 5639 S State St, Chicago 60621 | (773) 363-1107 |
| Us Security Assocs Inc 400 N May St, Chicago 60622 | (312) 421-3250 |
| North Central Security Po Box 30033, Chicago 60630 | (773) 467-1229 |
| International Tower Bldg 8550 W Bryn Mawr Ave, Chicago 60631 | (773) 693-6161 |
| Securitas Security Svc Usa Inc 6327 N Avondale Ave 1, Chicago 60631 | (773) 594-6150 |
| Intell Security Inc 5760 S Archer Ave, Chicago 60638 | (773) 735-6666 |
| Industrial Patrol Svc Corp 1900 N Austin Ave, Chicago 60639 | (773) 237-2622 |
| Safety Service Systems 3809 N Cicero Ave, Chicago 60641 | (773) 282-4900 |
| Tight Security Inc 3440 W 111th St, Chicago 60655 | (773) 445-6364 |
| Tko Security & Invstgtns 3205 W 111th St, Chicago 60655 | (773) 298-0686 |
| Metro Security 6546 W Higgins Ave, Chicago 60656 | (773) 774-9966 |
| Secure Security Inc 5875 N Lincoln Ave 251, Chicago 60659 | (773) 769-1625 |
| Initial Security 600 W Jackson Blvd, Chicago 60661 | (312) 207-0341 |
| On-Guard Security Training 614 W Monroe St, Chicago 60661 | (312) 902-2615 |
| Titan Security Svc Inc 614 W Monroe St, Chicago 60661 | (312) 902-3400 |
| Nation Wide Security 20 W Hubbard St, Chicago 60610 | (708) 418-9937 |
| Abm Security Svc 1 N Lasalle St 1050, Chicago 60602 | (312) 499-0645 |
| Madison Securities 105 W Madison St, Chicago 60602 | (312) 201-8644 |
| Mc Coy Security Inc 20 E Jackson Blvd 1400, Chicago 60604 | (312) 992-2246 |
| Nsa Inc 343 S Dearborn St, Chicago 60604 | (312) 322-0000 |
| Gold Star Security Inc 664 S Clark St, Chicago 60605 | (312) 386-9580 |
| Griffin Security 125 S Wacker Dr, Chicago 60606 | (312) 214-6474 |
| Wackenhut Corp 155 N Wacker Dr 730, Chicago 60606 | (312) 236-8161 |
| Whelan Security 10 S Riverside Plz, Chicago 60606 | (312) 715-1090 |
| Monterrey Security Consultants 2232 S Blue Island Ave, Chicago 60608 | (773) 843-0434 |
| Moore Security Svc 1556 W 35th St, Chicago 60609 | (773) 376-7119 |
| Metro One Loss Prevntn Svc Grp 1050 N State St 2-5, Chicago 60610 | (312) 475-1145 |
| Real Deal Co Chicago 60610 | (312) 527-3398 |
| Spy Shop 1156 N Dearborn St, Chicago 60610 | (312) 658-0636 |
| Universal Security 1143 N Wells St, Chicago 60610 | (312) 787-4355 |
| Viking Security Inc 1030 N State St, Chicago 60610 | (312) 943-0762 |
| Here's The Deal Co 2331 N Lister Ave, Chicago 60614 | (312) 840-3325 |
| Patterson Security 2243 N Lister Ave, Chicago 60614 | (773) 276-1739 |
| Houston & Assoc Security 1809 E 71st St 221, Chicago 60649 | (312) 225-7352 |
| Maximum Security 2630 S Wabash Ave, Chicago 60616 | (312) 326-6005 |
| Skytech Enterprises Inc 2600 S Michigan Ave 309, Chicago 60616 | (312) 225-8886 |
| Csc Security Svc 8452 S Stony Island Ave, Chicago 60617 | (773) 328-0088 |
| Houston & Assoc Protective Svc 8211 S Exchange Ave, Chicago 60617 | (773) 221-5003 |
| Protection Services Inc Chicago 60618 | (773) 583-6682 |
| Reliance Security Svc Inc 4215 N Elston Ave, Chicago 60618 | (773) 539-1400 |
| Tactical Security Consultants 3311 N Hamilton Ave, Chicago 60618 | (773) 327-7227 |
| Soc Security Inc 7625 S Cottage Grove Ave, Chicago 60619 | (773) 483-0233 |
| Steiner Security Svc Inc 9143 S Ashland Ave, Chicago 60620 | (773) 881-1985 |
| Luna Security Svc 717 N Wolcott Ave, Chicago 60622 | (312) 421-5862 |
| Smart Protective Agency 3540 W 15th St, Chicago 60623 | (773) 542-7017 |
| Securitas Security Svc Usa Inc 500 N Pulaski Rd, Chicago 60624 | (773) 826-0500 |
| Page Security 2547 W 63rd St, Chicago 60629 | (773) 239-5256 |
| Elite Protection & Security 4543 N Lavergne Ave, Chicago 60630 | (773) 202-1440 |
| Jlb Professional Svc Inc Chicago 60631 | (773) 308-5617 |
| Kane Service Security Svc Chicago 60631 | (773) 594-6204 |
| Securitas Security Svc 6325 N Avondale Ave, Chicago 60631 | (773) 775-1158 |
| Security Management & Invstgtn 5648 S Archer Ave, Chicago 60638 | (773) 585-0400 |
| Security Professionals Inc 5650 S Archer Ave, Chicago 60638 | (773) 581-8181 |
| Pedersen's Protective 5021 W Belden St, Chicago 60639 | (312) 663-7300 |
| Illinois Security Svc Inc 10133 S Western Ave, Chicago 60643 | (773) 881-0044 |
| Nas Electronics 11059 S Homewood Ave, Chicago 60643 | (773) 233-0012 |
| Sky Tech Security Svc Llc 940 W 122nd St, Chicago 60643 | (773) 893-1017 |
| Willett Security Svc Inc 7217 S Yates Blvd, Chicago 60649 | (773) 375-3340 |
| Ifpc 5440 N Cumberland Ave, Chicago 60656 | (773) 714-9090 |
| Mc Coy Security Inc 9420 W Foster Ave, Chicago 60656 | (773) 992-2246 |
| Happie 3105 N Ashland Ave, Chicago 60657 | (773) 463-5373 |
| Securitas Security Svc Usa Inc 580 W Jackson Blvd, Chicago 60661 | (312) 715-1550 |
| Titan Security Group 614 W Monroe St, Chicago 60661 | (312) 575-9108 |