Meet the people leading WDTA

Nigel Burr brings a strategic, industry-wide perspective to his role as Chairperson of the Workplace Drug Testing Association (WDTA). With extensive experience working with organisations in safety-critical, regulated and high-risk environments, Nigel is strongly focused on strengthening governance, professionalism and consistency across workplace drug and alcohol testing.

As Chair, Nigel is committed to ensuring WDTA continues to operate as a credible and respected peak body, representing the collective voice of providers, suppliers and stakeholders while engaging constructively with regulators, standards bodies and government.

He believes the long-term success of the industry depends on clear standards, practical application, and a balanced approach that supports both safety outcomes and commercial realities.

Ann-Louise is a biochemistry science graduate with a long career across several multinational clinical diagnostics manufacturers. With a focus on abused and therapeutic drug monitoring, in both point-of-care (POCT) and laboratory diagnostics, she has held multiple trans-Tasman senior management roles.

She has been a nominated member of CH039 and CH036 since the 1990s.

Ann-Louise is currently owner and director of InScience Limited NZ, which supplies test products, support, consulting and training to the workplace drug testing industry across New Zealand. She is also co-owner and technical lead of the Drugwise testing group, which supplies drug testing services NZ-wide.

Ellie Dianati is a commercial leader with broad experience across national and international markets. She has led complex businesses through growth and change, and brings strong capabilities in strategy, governance and stakeholder engagement.

She currently leads Abbott’s Toxicology business across ANZ and the Pacific and serves on the WDTA Board. Ellie contributes a practical, business-focused perspective to the Board, with a strong commitment to advancing best practice across the workplace drug testing sector.

Timothy Walker is Co-Founder and Strategic Director of Global Risk Group (GRG), and an Advisory Board Member and Distributor for Neopharma Technologies Ltd. He supports organisations across workplace drug and alcohol testing, WHS compliance, safety program design, enterprise deployment and commercial strategy.

Through GRG, Timothy works closely with safety-critical industries to deliver practical, standards-aligned testing and Fit-for-Duty programs across Australia and New Zealand. Before GRG, he held a senior leadership role at Swisse Wellness, driving commercial growth across global markets.

Ashley Freedman is the Managing Director of Royal Medical Supplies, a specialist provider of workplace drug and alcohol testing products across Australia and New Zealand. A Chartered Accountant by background, Ashley has held senior finance and commercial leadership roles across the healthcare sector.

Ashley is proud to be involved with the WDTA, which plays an instrumental role in representing members’ interests in the development of Australian and New Zealand workplace testing standards. He values the support the WDTA gives members in understanding, interpreting and applying the Standards in practical workplace settings.