Our Leadership

Kirk Hardy


Kirk is the CEO and co-founder of The Drug Detection Agency (TDDA), Australasia’s leading workplace drug and alcohol testing and education provider.

Kirk is tasked with creating the strategy and managing the operations that keep TDDA the market leader in Australasia for drug and alcohol testing and education services. He ensures that TDDA’s end-to-end services provide clients with compliant systems and a high level of comfort in the creation of safer workplaces.

With over 15 years of experience, Kirk is an expert on substance use and testing technologies in the workplace. He is a former long-standing board member of the U.S based Drug and Alcohol Testing Association (DATIA) and National Drug and Alcohol Screening Association (NDASA), and the chair of both organisations’ international committees. Kirk regularly presents at international conferences on drug and alcohol use in the South Pacific, and the ever-developing drug market, and is New Zealand’s leading expert on current global and local drug trends.

Before joining TDDA in 2005, Kirk was a New Zealand Police Drug Squad Detective, involved in investigating national and international drug syndicates and targeting organised crime groups. He has maintained those contacts and is one of only four Australasian members of the Californian Narcotics Officers Association (CNOA), providing him access to the very latest in drug and alcohol testing technology.

TDDA has 65 businesses throughout Australia and New Zealand, including a dedicated drug-testing laboratory. It has achieved Australasian accreditation for on-site drug and alcohol screening throughout its 27 operations in New Zealand and in each state of Australia. TDDA is the first Australasian company to have received the Trans-Tasman ISO 15189 accreditation to the AS/NZS 4308 and AS4760 drug testing standard (further details can be found here). Two of its executive team members helped the development of the latest oral fluid testing standard, the AS4760-2019.

Kirk’s favourite quote:

“Quality means doing it right when no one is looking”


TDDA Board of Directors/Advisors


Callum MacDonald

Callum is the principal of Buchanan Macdonald Chartered Accountants, a prominent North Shore Chartered Accounting and business advisory firm. Previously he spent a number of years in an international Chartered Accounting firm after a period working in a large District Health Board. Callum splits his time between client advice, directorships, advisory board roles, trusteeships (including Auckland Volunteer Coastguard Charitable Trust and Capri Hospital Charitable Trust) and Court expert witness work. He is a member of Chartered Accountants Australia and New Zealand and the Institute of Directors.


Dame Julie Christie

Media consultant Julie was the founder of Touchdown Productions, the leading New Zealand television production company she sold to Dutch media group, Eyeworks, in early 2006. Specialising in formats for the international markets, she licensed programs to 30 countries including the United States, the United Kingdom, France and Germany.

Julie was made an Officer of The New Zealand Order of Merit for services to film and television and was the 2008 Veuve Clicquot New Zealand Businesswoman of The Year. More recently, Julie was recognised in the Queen’s Birthday Honours 2017 and received ONZM for services to governance and the television industry. Her most recent venture is investing in New Zealand and Australian franchises of The Drug Detection Agency.

As well as being a board member of New Zealand Trade and Enterprise, Julie sits on the commercial committee of the New Zealand Rugby Union and on the New Zealand Story Advisory Group. She is also a board member of Mediaworks.

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