Government-approved Sustainability Certification Authority 

Green Tick Certification Limited (GTC) is a New Zealand registered limited liability company.  In 2006 GTC became a Government-approved sustainability certification authority in New Zealand and Australia.




GTC was founded by a small group of New Zealanders with the same vision: Principal Scientist Susan Harris, Principal Engineer Wayne Brown, and Principal Planner Jeff Kemp, supported by their spouses and family.  These parties privately funded the research project and start-up company that developed the Green Tick Certification System and made it available world-wide.



Key Staff

Key staff are Chief Executive Officer and Principal Scientist Susan Harris, and Commercial Manager Keith Wood.  


Susan has over 25 years' experience in environmental consultancy and research in multiple industries.  She is a recognised world authority on sustainability. Email Susan.


Keith has over 30 years' experience in commercial development and marketing of new innovations and green technology.  Email Keith.


They are supported by a global network of registered Green Tick Auditors and Advisors from leading environmental and engineering consultancies.


Green Tick - The Ultimate Ecolabel.




T: 64-4-382-9669

M: 64-22-1544-958

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