Government Licensed
36 Years Experience


    Founded in 2001, Polygraph Investigative Services is Asia's leading private polygraph agency providing a wide spectrum of polygraph aka lie detection services, including polygraph testing, training, consulting and equipment sales. We serve clients all over the ASIA PACIFIC REGION and Western countries, including China, Hong Kong, Macau, Indonesia, Thailand, Malaysia, Vietnam, Cambodia, Taiwan, Middle East - United Arab Emirates, Bahrain, Qatar, India, Australia, New Zealand, Brunei, Philippines,etc. We conduct lie detector tests in our office in Singapore as well as in countries where our clients are located. Our clients include Singapore Government agencies (See list of Government clients), top legal firms, multinational companies, small businesses and private individuals. All cases are treated with the strictest confidentiality.

    Its founder and Chief Polygraph Examiner is Mr Koa Fung Chew, PPA, PBS, a retired Superintendent of Police from the Singapore Police Force, an expert in Interviewing and Polygraph Testing with more than 36 years of experience in government and corporate investigations related to criminal, intelligence and security.


Polygraph Testing (Lie Detector Test)

We provide professional lie detector testing services to employers as an investigative aid to expeditiously solve any type of difficult or complex cases, especially "insider jobs" involving many suspects and crimes like theft, fraud, corruption, insider sabotage, leakage of commercial secrets etc. We help you pick out the guilty and exonerate the innocent.

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Relationship And Fidelity Issues

This lie detector test is used to determine whether one partner had cheated on the other.

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Polygraph Pre-employment Tests

Background checks using interviewing and lie detector testing for pre-employement screening with regard to qualifications, criminal record, undetected crimes and other unsuitable behaviour or attributes. A quick, accurate and cost-effective screening method, it is used by government agencies for sensitive positions and is now available to the private sector.

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In-service Polygraph Screening of Employees

This is a routine lie detector test to screen serving employees to find out whether they have committed serious workplace crimes like theft, fraud, insider sabotage, corruption, leakage of company secrets etc.

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Polygraph Support for Defence Lawyers

These lie detector tests are conducted at the request of defence counsels on their clients with the view to making representations to the prosecutors.

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Polygraph Consultancy Services

We provide polygraph consulting and testing services to local and foreign government law enforcement agencies ...

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Polygraph Training

American Polygraph Association (APA) accredited polygraph training since 1973 - we conduct basic polygraph course, advanced polygraph course and polygraph screening courses for government agencies around the world. Conducted by The American Institute of Polygraph Technology and Forensic Psychophysiology, the courses are held in Singapore or in other host countries. Director and Chief Instructor: Mr Lynn P Marcy, M.S, former APA President; Assistant Director: Supt (Ret.) Koa Fung Chew, PPA, PBS, Primary Instructor certified by APA.

See Our Range of Polygraph Courses ...

See Course Programme And Schedule ...

Psychodynamics of Interviewing and Interrogation Courses

This course is designed for Law Enforcement Investigation Officers, Polygraph Examiners and people involved in investigative interviewing. The course objective is to enhance the effectiveness of Law Enforcement Investigators in obtaining confessions and valuable intelligence in the course of their work using proven psychological techniques. This course is also useful for auditors and in-house investigators in the private sector.

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Polygraph Equipment aka Lie Detector Sales

Sale of State-of-the-art polygraph aka lie detector equipment and accessories. We provide various training programmes together with the sale of these lie detectors. Increase your effectiveness with our specially designed Multi-system Marcy Polygraph Countermeasure Chair PT-108 with concealed sensors and wirings.

See Our Range of state-of-the-art polygraphs and counter-measure chair ...

Private Investigation Services for Businesses and Private Individuals

Covert Surveillance | Computer Forensics | Discrete background Checks.

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Government and Law Enforcement Agencies (See list of Government clients) | Multi-national and Government-linked Companies | Retail Businesses | Warehouses | Diamond Companies | Guard and Escort Services | Casinos | Defence Lawyers | Private Individuals.


Worldwide Polygraph Services, including China, Hong Kong, Malaysia, Taiwan, Thailand, Australia, New Zealand, India, Indonesia, Philippines, Brunei, Pakistan, Singapore, Mexico, Middle East & USA and other Western countries.

  All Enquiries Welcome

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Direct Lines (Singapore) :
Tel: +65 - 6737 9117
Fax: +65 - 6737 9115

Office Address:
Polygraph Investigative Services
151 Chin Swee Road #03 - 33
Manhattan House
Singapore 169876

See Location Map