- Achievement Tec
 - Dallas - Assessment technology company offering a variety of human resource services. - Aegis Investigative Servcies
- Arlington
- BTi
- Dallas - Offers pre-employment background screening services to large and small businesses.
- Factual Information Resource Services of Texas, Inc. (FIRST, Inc.)
- Dallas - Offers background checks, criminal investigations, and courthouse research.
- GA Public Record Services Inc.
- Dallas - Performs on-site searches of criminal and civil records for businesses nationwide.
- General Information Services, Inc.
- Dallas - GIS is a worldwide resource for corporate and organisational background screening services and overall workforce management products.
- Integrity Center Inc
- Dallas - National pre-employment screening agency from which companies can obtain free screening access software, risk management info, newsletters, and tutorial.
- Investigative Resources of Texas
- Fort Worth - Offers a variety of investigative services.
- Paul Beasley & Associates
- Dallas - Private investigation company.
- Paul C. Beasley & Associates Inc.
- Dallas - Private investigator.
- Pennell & Associates
- Corsicana - Offering nationwide pre-employment background checks, including criminal, civil, and driving records, credit checks, and identity verification.
- Private Detective Online
- Plano - Offers software for genealogy information, searches, credit reports, adoption records, divorce information, and more.
- Pyramid Investigative Agency
- Dallas - Serving the state of Texas with licensed private investigators.
- Research & Discover
- Mansfield - Private investigators providing confidential services including video surveillance, background checks, skip tracing, and subpoena delivery.
- Secret Investigations
- Bedford - Specialises in insurance fraud, counter-stalking, nanny watch technology, databases, and background checks.
- Secure Source Incorporated
- Southlake - Specialises in executive protection, security consulting and training, and investigative services worldwide.
- Taylor Investigations
- Dallas - Offers a full range of services.
- Texas Investigations, Incorporated
- Hurst - Specialises in insurance, legal, and corporate investigations throughout Texas.
- Wilson, Gil
- Dallas - Providing litigation support, civil, and criminal investigative services to attorneys, private companies, corporations, and individuals
- WJP & Associates
- Dallas - Providing pre-employment background checks, including state and federal criminal searches, credit reports, Bar standings, and more.
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