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OHTA, an organisation predominantly comprised of volunteers, relies on the commitment and support of many hardworking people. 

We wish to thank all the volunteers who provide their valuable time and expertise to work on projects and to lead the organisation.

Editorial Review and Development

There are many volunteers supporting English language module review and development projects. Each project requires a team of people to conduct the review, and in many cases, training providers have also taken the time to provide written feedback. We are enormously grateful to everyone who is working on these projects, and to those who have volunteered previously to work on projects.

THANK YOU particularly to the following people:


W201- Basic Principles (revision)

Dr Kerrie Burton (lead) - Dr Brian Davies AM - John Dobbie - Jen Hines - Terry McDonald/ recent feedback from John Henderson

Status: revision published 2017   


W501- Measurement of Hazardous Substances (revision)

Michael Connor (lead) - Mike Slater - Dr Edward Zellers - Dr Mary O'Reilly - Richard Topliss - Karen Bufton - Martin Axon - Holly Fletcher

Status: revision in progress


W502- Thermal Environment (revision)

Dr Ross Di Corleto (lead)

Status: revision published 2016


W503- Noise- Measurement and its Effects (revision)

Dr Thais Morata (co-lead, NIOSH) - Bernard Fontaine (co-lead) - Dougie Collin - Anish Ranpuria - Derek Miller - Benjamin Mueller - Jack Zybura - Maria Strickland (NIOSH)

Status: revision in progress


W504- Asbestos and Other Fibres (revision)

Jonathan Grant (lead) - Linda Apthorpe - Andreas Wagner - Dr Stephanie Carter - Chris Donne - John Robson - John Meates - John Corr - Gerald Shewring - Philip Hibbs

Status: revision in progress


W505- Control of Hazardous Substances (revision)

Gregg Grubb (lead)

Status: currently assembling team


W506 –Ergonomics Essentials (revision)

Terry McDonald (lead) - Dr David Rogers - Dr Norbert Wagner

Status: revision in progress


Silica Hazard Awareness  new module (one day)

Nancy McClellan (lead, OHTA) - LCDR Catherine Beaucham (NIOSH) -  LCDR Reed Grimes (NIOSH) - CDR Marna Hoard (NIOSH) - RADM (ret.) Dr. Margaret Kitt (NIOSH) - Dr Leslie Nickels (NIOSH) - Deborah Hoyer - Perry Gottesfeld (Occupational Knowledge International) - Terry McDonald -  Dr. Kevin Hedges (WHWB International and Occupational Health Clinics for Ontario Workers Inc.) - Marianne Levitsky (WHWB and ECOH Management Inc.) - Dr. Mary O'Reilly (WHWB and SUNY School of Public Health at Albany)

Status: published 2019


Occupational/Industrial Hygiene in the Mining and Mineral Processing Industries (new module)

Dr Ross Di Corleto (lead) - Ian Firth - Tim White - Dr Brian Davies AM - Jane Whitelaw - Dr Thomas P Fuller

Status: to be published shortly


Occupational/Industrial Hygiene in the Oil & Gas Industry (new module)

Noel Tresider AM (lead) - Dr Raelene Young - Stephen Dean - Tracey Bence - Wayne Powys - Ben Pandher - Brett Young - Russell Bond - Norhazlina - Mydin - Marina Zainal Farid - Maria Strickland (NIOSH) - CDR Marna Hoard (NIOSH) -  CDR Ryan Hill (NIOSH) - David Caruso (NIOSH)

Status: in progress


Occupational/Industrial Hygiene in the Pharmaceutical Industry (new module)

Nancy McClellan (lead) - Steve Bailey - Dr Adrian Hirst - Maharshi Mehta - Lisa Cardo

Status: in progress