Southwest Polygraph Service  
   Fort Worth, Texas agency advertising polygraph examinations, instant drug tests, and psychological profile analysis.
   http://pages.sbcglobal.net/donmarsh/

Answers Private Detective Agency  
   Austell, Georgia detective agency offering polygraph examinations.
   http://www.answers-PI.com/

Distress Services UK  
   Polygraph examiner in Leatherhead, Surrey, UK.
   http://polygraphs.co.uk/

Polygraph Investigative Services  
   Singapore polygraph company providing polygraph testing services and training.
   http://www.polygraphis.com/

Wygant Polygraph  
   James R. Wygant, retired polygraph examiner in Portland, Oregon who still teaches and does presentations.
   http://home.earthlink.net/~jrwygant/

Truth or Lie Polygraph Examination Agency  
   Computerized polygraph agency in Southern California.
   http://www.truthorlie.com/

Charles Lynch Polygraph  
   Certified examiner licensed to conduct examinations in North Carolina and Virginia.
   http://carolinavirginiapolygraph.com/

National Polygraph Consultants, LLC  
   Polygraph quality control, training, program development, testing, and other services.
   http://www.nationalpolygraphconsultants.com/

IQM Inc.  
   Fort Worth polygraph examiners serving clients in North Texas.
   http://www.polygraph.to/new/

Credential Investigations Group, LLC  
   Retired federal agents provide polygraph and security guard services in Dallas, Texas.
   http://www.cigoftexas.com/

Centre for Forensic Psychophysiology Ltd.  
   Inter-disciplinary team of forensic psychologists and computer scientists operating throughout the European Union.
   http://www.forensic-centre.com/

Michael D. Park & Associates Polygraph  
   Dallas, Texas examiners performing assessments for domestic infidelity, employee theft, and attorney/client examinations.
   http://www.dallaspolygraph.com/

Imbordino Polygraph Examinations, LLC  
   Certified polygraph testing service based in Georgia and South Carolina, but examinations can be administered anywhere. Expert polygraph witness and former federal examiner.
   http://www.ImbordinoPolygraph.com/

Neal Investigations and Polygraph  
   Polygraph examiner and licensed private investigator based in California.
   http://nealpi.com/