James W Kenney Interests
- Private investigator offering global services. Based in San Antonio.
- http://www.kenneyinvestigations.com/

Global Security and Investigation
- Offering private investigation and security services. Houston.
- http://www.global007.com/

Ferguson Investigations & Security Consultants
- Specializing in protection and information gathering services. Provides company information and references. Houston.
- http://houstoninvestigators.com/

Robert Grieve International
- providing investigative services from offices in Houston.
- http://www.robertgrieve.com/

Imperative Information Group
- Private investigators providing due diligence and employment-related investigations.
- http://www.imperativeinfo.com

Roger Holloway
- Full service private investigation agency located in Wichita Falls.
- http://www.texasdetective.com

Arbiter Investigations
- A full service investigative firm located in Austin.
- http://www.arbiter-investigations.com/

Southwest Security and Investigations
- A security agency dealing with site security, industrial security and counter espionage.
- http://www.go-ssi.com

Paladin International, Inc.
- Specializes in catering to the corporate and business communities and select individuals.
- http://www.paladin-intl.com/

Grove Investigations
- Private investigator for hire based in Houston, Texas.
- http://www.davidmgrove.com

Advanced Investigative and Screening Solutions
- a Houston based licensed investigations company.
- http://www.houstonpi.com

Central Texas Investigative Services
- Full service investigations company providing services to Southern, Central, and Eastern Texas.
- http://www.ctis.cc

Paul C. Beasley & Associates, Inc.
- Full service private investgations with offices in Dallas.
- http://www.dallaspi.com

Morris Investigations
- Specializing in surveillance, investigations, process service, and background checks in the Houston area. Includes services provided, list of references, and fees. Kirkwood.
- http://www.morrisinvestigations.com/

Triad Investigations Agency
- Full service investigations agency.
- http://www.triadinvestigationsagency.com

Acta Investigations, Inc
- Pre-trial, legal and corporate investigations. Located in Houston.
- http://www.acta-pi.com/