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Members of the Board

Responsible for the strategy, governance and direction of OHTA

The Board is responsible for the strategy, governance and direction of OHTA. It 
has developed following a series of constitutional changes designed to enable greater involvement from IOHA and member associations and to ensure a sustainable rate of growth for OHTA. 

The Board consists of 11 individuals who are actively engaged in building OHTA. Some are business leaders and senior professionals within national occupational hygiene associations, others are senior occupational hygienists, and a number have been involved with OHTA since the beginning. All are committed to improving standards of occupational hygiene around the world. 

You can often meet them in person at national and international hygiene conferences and they all welcome the chance to talk more about OHTA.

Individuals on the Board derive no personal financial benefit from their involvement.

Ms Chris Laszcz-Davis MS, CIH, FAIHA, REPA, AIC Fellow, COH 

As President of The Environmental Quality Organization (EQO) LLC and former Corporate Vice-President, EH&S, Operational Integrity and Product Stewardship, Kaiser Aluminum & Chemical Corporation, Chris has over 35 years of executive management, professional, operational, technical and consulting experience in occupational safety & health, environmental affairs, operational integrity, risk management, product stewardship/quality, strategic planning, auditing, and corporate acquisitions/ divestitures in industry and government. Prior to working for industry, Chris worked for the US Department of Energy (DOE) as a regional Manager.

Chris is an American Industrial Hygiene Association (AIHA) Fellow, an American Institute of Chemists (AIC) Fellow, and a recipient of several awards including national AIHA’s Kusnetz and Alice Hamilton awards. As Past President, American Academy of Industrial Hygiene (AIH), Chris was instrumental in having the profession sponsor its first major Conference on Risk Assessment in the early 1990’s. Chris has served on numerous boards including the American Conference of Governmental Industrial Hygienists (ACGIH) and AIHA, as well as being a Trustee for both the American Board of Industrial Hygiene (ABIH) and the American Industrial Hygiene Foundation (AIHF). When with ABIH, she served as ABIH’s delegate to the IOHA National Accreditation Recognition (NAR) Committee. She is a 2017 member of NIOSH’s Board of Scientific Counselors (BSC), and Past-President/ongoing Board member of California Industrial Hygiene Council (CIHC), an EH&S legislative advocacy group. Chris was also recently appointed to California’s Health & Safety Standards Board by Governor Edmund Brown. Chris is a member of the American Industrial Hygiene Association (AIHA), the British Occupational Hygiene Society (BOHS) and the Australian Institute of Occupational Hygienists (AIOH). Chris is joint Chair of the Board of Trustees of OHTA.

Dr Ross Di Corleto COH

Ross Di Corleto has been involved in occupational health & safety and occupational hygiene for 35 years with experience in the power industry, mining and refining, nationally within Australia and internationally. He has a Bachelor of Applied Science, Post Graduate Diploma in Occupational Hygiene, a Master of Science by research, and a PhD in occupational health and is Adjunct Associate Professor, University of Queensland.

He is a certified hygienist, a Fellow & Past President of the Australian Institute of Occupational Hygienists and recipient of the AIOH Pamela De Silva Award and a Fellow of the Safety Institute of Australia.

He has been involved in the development and presentation of undergraduate and post graduate modules in occupational health and has lectured at a number of Australian Universities. Ross is currently the Director/Principal Consultant for Monitor Consulting Services based in Brisbane.

Dr Thomas P Fuller, ScD, CIH, CSP, MSPH, MBA

Dr Fuller has over 35 years of experience in occupational safety, industrial hygiene, infection control, environmental management, and public health. He is the American Industrial Hygiene Association (AIHA) representative on the International Occupational Hygiene Association (IOHA) Board and Past Chair of the AIHA International Affairs Committee. Committed to improving occupational hygiene education and training, he is Associate Professor at Illinois State University, and also teaches OHTA courses on behalf of Workplace Health Without Borders (WHWB). Dr Fuller also fulfils the role of interim IOHA representative to the OHTA Board.

Mr Peter-John Jacobs, ROH

Mr Jacobs is a former president of the Southern African Institute for Occupational Hygiene (SAIOH),  and has been actively involved in occupational hygiene for almost 30 years having spent the last 10 years working the mining and energy industries. He now works as a consultant for Sedulitas. He has also served as the president of the International Occupational Hygiene Association (IOHA).

Ms Ruth Jimenez Saavedra MSc MBA LFOH

Ruth Jimenez Saavedra is the current President of the Spanish Association of Industrial Hygiene and Secretary/Treasurer of the International Occupational Hygiene Association. She has wide experience in Occupational Hygiene in the UK and Spain and was a member of the OHTA Leadership Group until April 2015. She has participated in several working groups in the European Commission, the National Commission for Health and Safety at Work and national and European standardisation bodies. For the last six years she has been working at the Spanish National Institute for Health and Safety at Work managing projects on chemicals, nanomaterials, exposure modelling, control banding tools, REACH and CLP. She has also been a visiting lecturer at several Universities in Spain, Italy, Peru, Portugal. 

Mr Alan Leibowitz CIH, CSP, FAIHA 

Alan Leibowitz is President of EHS Systems Solutions, a consultancy solving leadership and management systems challenges. He previously spent 35 years with ITT ultimately leading its global EHS and Security program. In this role he directed all program elements including industrial hygiene, sustainability, business continuity, product safety, auditing and environmental remediation. He is a leader in management systems who led the development of ANSI Z10. He served on the Board of Directors of AIHA, NAEM, RAB and the Center for Safety and Health Sustainability (CSHS). He chaired EHS councils for the Electronic Industries Alliance (EIA), Aerospace Industries Association (AIA) and was a Liaison Delegate to the WBCSD. He currently chairs the Board for Global EHS Credentialing (BGC), the parent organization for the ABIH. 

Dr Zack Mansdorf, CIH, CSP, QEP, FAIHA

Dr Mansdorf is a distinguished occupational hygienist with a background in insurance, academia, consulting and industry. He is a former senior vice president of L’Oreal with considerable international experience. He is a former president of AIHA and has served on the governing bodies of many US IH/OH and safety organisations. 

Ms Lynn O'Donnell CIH, FAIHA

Lynn O'Donnell received degrees in Nursing, Industrial Hygiene and Management from the University of Virginia, University of Michigan and Aquinas College. From 1977–1990, she worked for the Michigan Department of Public Health, Division of Occupational Health in the areas of compliance, consulting, training and education and health standards promulgation. O’Donnell was certified by ABIH in Comprehensive Practice in 1981 and also received the Bloomfield award from ACGIH that year. She is a Fellow Member of AIHA, served as ABIH Director 1983-1989; Academy Councilor 1986-1988; AIHA Director 1989-1992 and Executive Director of the American Board of Industrial Hygiene from January 1991-June 2014. In 2010, O’Donnell received the AIHA Alice Hamilton Award and was the recipient of the first ABIH Lynn C. O’Donnell Lifetime Achievement Award in 2014. 

Mrs Lucetta Weaver

Lucetta Weaver is a chartered Industrial Hygienist working for the central BP Safety & Operational team, based in London. She has 17 years’ experience within BP working in a variety of Occupational Hygiene and HSE roles in Oil & Gas Exploration & Production, Refining and Marketing and Centralised Group Functions. Lucetta’s current role is Regional Industrial Hygiene Director Middle East & Africa. Building Industrial Hygiene capability is a special interest  and one of the key purposes of her current role is building IH capability in countries in which BP operates in this Region – including Angola, Oman,  Iraq and Egypt. Outside of work Lucetta is married with two daughters aged 5 and 3 which keep her busy! She is a keen athlete and enjoys a range of outdoor sports.


Mr Steven Verpaele, MSc

Steven Verpaele currently works as manager Industrial Hygiene at the Nickel Institute and had senior roles at Mensura and the University College of Ghent. He is founder and president of the Belgian Centre for Occupational Hygiene (BeCOH), board member of the Belgian Society for Occupational Hygiene (BSOH), extraordinary member of the Belgian High Council for Prevention and Protection at Work and the Belgian representative in the EU OH platform. With a Master’s degree in Environmental Chemistry – Industrial Hygiene, he has more than 10 years’ experience as an expert in different ISO and CEN workgroups, with primary focus on workplace atmospheres. Steven is joint Chair of the Board of Trustees of OHTA. 

Dr David M Zalk, CIH, MPH, FAIHA

A former president of IOHA and current IOHA envoy to the World Health Organisation (WHO), Dr Zalk has assisted in the founding of various global outreach efforts. He has been chair of many IH/OH Committees within AIHA and the American Conference of Governmental Industrial Hygienists (ACGIH). A Director of Occupational Hygiene for the GPOHP Online Course at the University of Illinois at Chicago, Dr Zalk is also a Deputy Team Leader for ES & H at the Lawrence Livermore National Laboratory.

Lab bench work

Lab bench work

Using solvent to wash a chemical under vacuum filtration on the laboratory bench

The Board

  • Chris Laszcz-Davis
  • Ross Di Corleto 
  • Thomas P Fuller
  • Peter-John Jacobs
  • Ruth Jimenez Saavedra
  • Alan Leibowitz
  • Zack Mansdorf 
  • Lynn O'Donnell
  • Steven Verpaele
  • Lucetta Weaver
  • David Zalk