| Investigative Resources International | nationwide | 800-252-5853 |
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| Central Coast Investigative Services Incorporated | Salinas, CA | (831) 422-9111 |
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| Arcy Professional Investigations, Inc. | Paradise, CA | 1-877-474-2729 |
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| CDS Group International LLC | nationwide | 402-462-9966 |
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| Verdict Resources, Inc. | nationwide | 888-800-8895 |
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| PPS & Associates, LLC | nationwide | 888-433-4943 |
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| Hodson and Associates Investigations | Orange County, CA | 714-773-5345 |
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| Investigation and Paralegal Group | nationwide | 314-642-6000 |
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| Michael Wolf Enterprises | Calabasas, CA | (818)591-5986 |
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| Pearne Investigation Agency | San Jose, CA | (408) 243-6066 |
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| LandAmerica Information Company | nationwide | 800-368-3380 |
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| OmniTrace Corporation | nationwide | 888-965-6696 |
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| David L. Warkentine-Private Investigator/Polygraph | Channel Islands Harbor, CA | 805-653-6626 |
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| The John Haus Group (Va. DCJS 11-3303) | nationwide | 1-866-788-7010 |
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| 3rd Degree Investigations, Inc. | nationwide | 919-872-2270 |
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| Gladding & Michel, Investigative Offices | Burlingame, CA | 650-692-1140 |
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| L.S.S. Consulting Inc. Legal and Security Strategics | nationwide | 248-366-5020 |
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| Donofrio & Associates | San Francisco / Bay Area, CA | 800-997-7674 |
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| IPSA Intenational, Inc. | nationwide | (510)748-1234 |
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