| Business | Phone |
| A1 Parking Enforcement Madison 53704 | (608) 242-9201 |
| Attoe-Watson & Co Inc 579 Donofrio Dr, Madison 53719 | (608) 833-6303 |
| Capitol Security & Patrol 902 Lawrence St, Madison 53715 | (608) 294-1922 |
| Court Security 120 N Henry St, Madison 53703 | (608) 441-2437 |
| Wackenhut Corp 2000 Engel St, Madison 53713 | (608) 442-0561 |
| Twin City Security Madison 53716 | (608) 223-3180 |
| Executive Privileges 2606 Pheasant Ridge Trl, Madison 53713 | (608) 276-4494 |
| Security Management Corp 2418 Crossroads Dr 1200, Madison 53718 | (608) 242-1821 |
| Professional Security 6400 Monona Dr, Madison 53716 | (608) 224-2177 |
| Its 4000 International Ln, Madison 53704 | (608) 249-8344 |
| Jbm Patrol 3110 Kingsley Way, Madison 53713 | (608) 222-5156 |
| Knightside Services 1250 Femrite Dr, Madison 53716 | (608) 222-8730 |
| Midwest Patrol & Investigative 5910 Mineral Point Rd, Madison 53705 | (608) 233-5378 |
| Madison Security Inc 2041 Baird St, Madison 53713 | (608) 251-1173 |