| Absolute Investigative Fingerprinting and Security Services | Towson, MD | 410-828-6460 | | Claim Listing |
| Admiral Security Services | Bethesda, MD | 301-656-9382 | | Claim Listing |
| Allied Universal Security Services | Hagerstown, MD | 301-739-0801 | | Claim Listing |
| Atlas International Security | Capitol Heights, MD | 301-324-0060 | | Claim Listing |
| Blueguard Security Inc | Dundalk, MD | 410-800-4676 | | Claim Listing |
| Blueline Security Services | Landover, MD | 301-278-7766 | | Claim Listing |
| Bri-Bet Security Solutions | Middle River, MD | 443-278-4477 | | Claim Listing |
| Brown's Security Services | Baltimore, MD | 443-392-5860 | | Claim Listing |
| CES Security | Silver Spring, MD | 301-608-8264 | | Claim Listing |
| Champion National Security - Baltimore | Glen Burnie, MD | 410-663-8244 | | Claim Listing |
| Core Security Solutions Inc | Greenbelt, MD | 301-474-0133 | | Claim Listing |
| Crown Security System Inc | Baltimore, MD | 410-235-5577 | | Claim Listing |
| Knight Protective Services Inc | Greenbelt, MD | 301-808-4669 | | Claim Listing |
| Maryland Security Professionals | Annapolis, MD | 410-224-3028 | | Claim Listing |
| Master Security Co LLC | Hunt Valley, MD | 410-584-8789 | | Claim Listing |
| Prince Security Services | Silver Spring, MD | 301-563-3333 | | Claim Listing |
| Securitas | Baltimore, MD | (443) 436-3243 | | Claim Listing |
| Security Protective Services Inc | Lanham, MD | 301-459-8322 | | Claim Listing |
| Stanley Convergent Security Solutions | Rosedale, MD | 410-780-2000 | | Claim Listing |
| Trust Security Services | Baltimore, MD | 443-826-9833 | | Claim Listing |
| U.S. Security Associates, Inc | Gwynn Oak, MD | 410-277-4682 | | Claim Listing |
| Watkins Security Agency Inc | Baltimore, MD | 410-523-5080 | | Claim Listing |
| Whelan Security | Hyattsville, MD | 301-459-2355 | | Claim Listing |
