Contact Us

Our four branches

39 Kuiperskraal street, De Born, Bellville, 7530

Paul van Niekerk and Linda van Niekerk

paul@global.co.za
linda@global.co.za
ptv@global.co.za

Tel. No. (021) 949-4646

Paul van Niekerk:  Paul obtained his B. Comm. degree at the University of Pretoria in 1992 and his B. Comm. Honors at the same institution in 1994.  He worked for the National Intelligence Agency until 1995 when he relocated to Cape Town and started practicing as a private Polygraph Examiner.

Paul was trained as a Forensic Psycho physiologist (Polygraph Examiner) by the Israel Polygraph Institute in 1992 and did his Advanced course in Polygraphy, presented by Argenbright International Institute of Polygraph, in 1998. He also attended an advanced course in Forensic Assessment Interview, Integrated Interrogation Technique and Statement Credibility and Analyses. Advanced and Specialized training course in 2007 and the course was conducted by the American Polygraph Association.

Paul also attended numerous other continuous education courses and to date has conducted approximately 25 000 Polygraph Examinations.

In 2016, Paul attended a two day APA seminar presented in Cape Town.

Linda van Niekerk: Linda completed her B. Iuris degree in 1990, at the University of Pretoria. By 1994, she completed her LLB, at the same institution. From 1991 to 1996, she was employed as a legal advisor in Gauteng. From 1996, she started her own businesses in the security field. She gained experience in accounting, personnel placement / human resources and business management.

In 2017, Linda completed her training at the Academy for Scientific Investigative Training (ASIT). During the same year, she joined the American Polygraph Association (APA).

Up to date, she has conducted almost 1 000 polygraph examinations, under the supervision of some of the most internationally experienced polygraph practitioners.

Ficus Block Fairway Green, 3 Abery Road, Kloof, KZN

Henry Roberts & Jacques Prinsloo

henry@ptvservices.co.za
jprinsloo@ptvservices.co.za

Tel. No.  (031) 765 4593

Henry Roberts: Henry worked in the South African Police Services as a member of the elite Special Task Force until 1996. During that year he received his training as a Forensic Psycho-physiologist (Polygraph Examiner) at the Maryland Institute of Criminal Justice in the United States of America.

In 1998 he attended an Advanced and Continuous education course in Forensic Psychophysiology presented by the Argenbright International Institute of Polygraph. He also completed a SCAN (Scientific Content Analysis – Verbal Inquiry) course developed by Mr. Avinoam Sapir that same year and in 2007 he attended another Advanced and Continuous Polygraph Workshop presented by the American Polygraph Association.

Henry also attended numerous other continuous education courses and to date has conducted approximately 20 000 Polygraph Examinations.   

Jacques Prinsloo: Jacques obtained his international diploma in Forensic Psycho-Physiology (Polygraph Examiner) in 2015 at the American International Institute of Polygraph, he also attended an advance training seminar presented by the American Polygraph Association in testing suspected sex crime offenders, sexual behaviour issues in vetting, reported victim testing, Empirical scoring system and Testimony outline (Barland-Generic for APA).

To date Jacques has conducted approximately 1000 Polygraph Examinations.

318 The Hillside street
The Hillside Building
Lynnwood

Room 407

Mornè Roberts & Elna van Zyl

gauteng@ptvservices.co.za

Tel. No. (012) 997-6648

Cellphone : 076 540 1341

Mornè Roberts: Mornè trained as a Forensic Psycho-physiologist (Polygraph Examiner) in 1999 at the International Academy of Polygraph in Fort Lauderdale, Florida, United States of America. In 2001 he did an Advanced training course in “Chart Interpretation and Numerical Scoring” at the Academy for Scientific Investigative Training in Centurion, SA.  In 2004 he also completed the “Sexual Offender” training course at the Academy for Scientific Investigative Training in Centurion, SA.

Mornè also attended numerous continuous education courses and conducted approximately 16 000 Polygraph Examinations.

Elna Van Zyl:  Elna obtained a South African Nursing Diploma in General Nursing in Pretoria during 1975 and in 1983 she did a South African Nursing Diploma in Midwifery in Vereeniging.  Elna did her training Forensic Psycho-physiologist (Polygraph Examiner) in 2008 at the American International Institute of Polygraph (SA) in Pretoria SA.

To date Elna conducted has conducted approximately 9 000 Polygraph Examinations.

129 Prospect Road, Walmer

Kobus van Heerden

kobus@ptvservices.co.za

Tel. No. (041) 581 4850

Kobus van Heerden: Kobus was trained as a Forensic Psycho-physiologist (Polygraph Examiner) at the Maryland Institute of Criminal Justice in the United States of America.  He completed an Advanced course in Forensic Assessment Interview, Integrated Interrogation Technique and Statement Credibility and Analyses and also did a course in Advanced & Continuing Education Polygraph Testing in 2007.

Kobus also attended numerous continuous education courses and conducted approximately 18 000 Polygraph Examinations.

George (Garden Route)

john@ptvservices.co.za

Tel. No. (083) 781 5394

John Roberts: John was a member of National Intelligence from 1986-1995 and received his training as a polygraphist in 1992 from the Israeli Polygraph Institute. As a founder member of Polygraph and Truth Verification services in 1997, John was instrumental in establishing the polygraph industry in the private sector.

During 1998 he attended an Advance and Continuous education course in Forensic Psychophysiology presented by the Argenbright International Institute of Polygraph. In 2007 he attended an Advanced and Continuous Polygraph Workshop presented by the American Polygraph Association and in 2019 a course through the International Polygraph Studies Centre (IPSC).

John attended numerous continuous education courses and has conducted in access of 15 000 polygraph tests. During this time John was involved in various high profile cases and also gave evidence in numerous hearings and at CCMA.