1. United Investigative Service
124 Mount Auburn St, Cambridge, MA 02138
Coordinate: 42.37332,-71.12301
Phone: (617) 717-8848
2. Lopez Lawrence C
49 Fayette St, Cambridge, MA 02139
Coordinate: 42.37308,-71.10305
Phone: (617) 497-6700
3. International Detective Bureau
46 2nd St, Cambridge, MA 02141
Coordinate: 42.36976,-71.07873
Phone: (774) 242-3884
4. First Protective Services
413 Windsor St, Cambridge, MA 02141
Coordinate: 42.37115,-71.09403
Phone: (617) 354-4888