| David L. Warkentine-Private Investigator/Polygraph | Channel Islands Harbor, CA | 805-653-6626 |
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| PPS & Associates, LLC | nationwide | 888-433-4943 |
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| Arcy Professional Investigations, Inc. | Paradise, CA | 1-877-474-2729 |
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| Gietzen & Associates, Inc. | nationwide | 888-779-2345
813-223-3233 |
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| The John Haus Group (Va. DCJS 11-3303) | nationwide | 1-866-788-7010 |
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| DTIS | nationwide | 402-438-6393 |
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| Investigation and Paralegal Group | nationwide | 314-642-6000 |
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| The Intelligence Group | nationwide | 908.901.0112 |
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| Marin Associates | San Rafael (San Francisco), CA | 415-454-4558 |
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| Pearne Investigation Agency | San Jose, CA | (408) 243-6066 |
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| Investigative Resources International | nationwide | 800-252-5853 |
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| Michael Wolf Enterprises | Calabasas, CA | (818)591-5986 |
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| Parrent Smith Investigation & Research | Los Angeles, CA | 310-275-8619 |
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| L.S.S. Consulting Inc. Legal and Security Strategics | nationwide | 248-366-5020 |
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| Hodson and Associates Investigations | Orange County, CA | 714-773-5345 |
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| Kalmbach and Associates | nationwide | 888-540-0601 |
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| Empire Surveillance & Investigations | Newport Beach, CA | 800-830-7030 |
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| Martino Consulting & Investigative Services Inc. | Mission Hills, CA | 818-472-0374 |
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| Verdict Resources, Inc. | nationwide | 888-800-8895 |
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