Proficiency Testing Australia (PTA) is one of Australia’s largest and most experienced proficiency testing providers.  PTA is a wholly owned subsidiary of the National Association of Testing Authorities, Australia (NATA) and was formed on 1 January 2006 to offer industry a choice of proficiency testing services for calibration, testing and inspection.  PTA provides a diverse range of proficiency testing programs and measurement audits to a very broad range of industries.  PTA delivers its proficiency testing, consultancy and training services internationally and nationally across Australia, with operations based in Sydney (head office) and Brisbane.  

PTA is:


PTA plays a key role in providing confidence to laboratories in their testing and measurement results.  As a proficiency testing provider, PTA provides a means of assessing the ability of laboratories to competently perform specific tests and measurements.  

PTA is continuously expanding and developing its range of proficiency testing programs, with numerous programs offered in the areas of Chemical Testing, Biological Testing, Construction Materials, Mechanical Testing, Non-Destructive Testing and Calibration.  PTA is also able to develop customised programs for individual facilities or industry organisations.


Internationally, PTA represents Australia through:


PTA provides a range of consulting services designed to improve business performance and reduce exposure to risk.  These consulting services are tailored to meet specific client needs and are provided across a range of disciplines including:

Proficiency Testing Australia has conducted statistical consultancy services for Australian Commonwealth Government departments, industry associations, laboratory accreditation bodies and reference material producers.  PTA provides statistical consultation to the Australian Government Department of Agriculture via the National Residue Survey (NRS).


More information about PTA’s proficiency testing programs, measurement audits, consultancy and training is available by contacting PTA on:

T +61 2 9736 8397

F +61 2 9743 6664

E This email address is being protected from spambots. You need JavaScript enabled to view it.

More information about all of PTA’s activities can be found on the PTA website


1 International Accreditation New Zealand
2 ISO/IEC 17043:2010 Conformity assessment - General requirements for proficiency testing
3 International Laboratory Accreditation Cooperation
4 ISO/IEC 17011:2004 Conformity assessment - General requirements for accreditation bodies accrediting conformity assessment bodies
5 APLAC MR001 Procedures for Establishing and Maintaining the APLAC Mutual Recognition Agreement Amongst Accreditation Bodies
6 ILAC-P9:2005 ILAC Policy for Participation in National and International Proficiency Testing Activities
7 APLAC PT 006 Proficiency Testing Frequency Benchmarks
8 ISO 13528:2015 Statistical methods for use in proficiency testing by interlaboratory comparison