Security Guards View Digital Directory go Results Found: 2 Button group with nested dropdown Price Security & Protection Services,... Price Security & Protection Services, Inc 312 Barksdale Avenue WALDORF MD 20602 (301) 535-1324 Blackout Investigations and Security ... Blackout Investigations and Security Services, Inc. 11750 Business Park Dr., #201 Waldorf MD 20601 (240) 419-2134