Organisations we've worked with:

Lean Six Sigma Yellow Belt

Lean Six Sigma Yellow Belt training provides an introduction to the methods, tools and systems needed to participate in process improvement projects.

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Lean Six Sigma Yellow to Green Belt Upgrade

Bridging the gap between Yellow Belt and Lean Six Sigma Green Belt certifications, the Green Belt Upgrade is ideal for expanding your skills and career potential.

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Lean Six Sigma Green Belt

Green Belt certifications from Thornley Group deliver Lean Six Sigma training for professionals wanting to lead effective process improvement projects.

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Lean Six Sigma Black Belt Upgrade

Become a Lean Six Sigma Black Belt and learn the skills and techniques required to coordinate Lean and Six Sigma projects at an organisational level.

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Upcoming Courses

IASSC Certified

NZ Organisation for Quality

Companies that trust us

Thornley Group has worked with some of New Zealand’s leading organisations from a range of industries, delivering training tailored to suit diverse business models and teams.

Westpac New Zealand Operations approached Thornley Group because several opportunities to improve the customer experience had been identified.

Thornley Group delivered a comprehensive Six Sigma journey that provided our team with the confidence to initiate, deliver and control important projects. Their training helped us develop a team of six sigma qualified leaders.

Thornley Group build capability whilst coaching and driving the execution together.

I would highly recommend Thornley Group.

Gary Butler
Head of Operating Model Transformation at Westpac Institutional Bank

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Other companies we help in this sector:

Healthcare companies we have worked with.


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Thornley Group were recommended by a current employee, and came with a great endorsement. The training was informative, detailed and fun. Lean Six Sigma provides an approach that can be applied to any problem.

Thornley Group’s presentation to the Site Leadership, acknowledged the commitment of time and effort required for a successful project. Addressing the Site Leadership on site was also key to them understanding what we were embarking on, was not going to be an overnight quick win. We are all making great progress in our projects and understanding processes and systems to depths we haven’t before.

I would recommend Thornley Group. Their hands-on experience on varied projects, provides a depth of knowledge and application that supports the theory with practice.

Christopher Price
Business Improvement Manager at Arnott’s

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Other companies we help in this sector:

Government organisations we have worked with.

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Fuji Xerox’s roll out of a ‘Global Services’ business model required a Six Sigma skillset to move towards a Services and Solutions approach. I was one of six people who were chosen to attend the Six Sigma training provided by Thornley Group. I later went on to upgrade to Black Belt through Thornley Group’s public course.

Thornley Group provided a very genuine service. Their communication skills were excellent and their on-going mentorship was and still is very much appreciated.

I would and do highly recommend the Thornley Group to everyone.

Keri Little
Business Improvement Manager at Fuji Xerox

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Other companies we help in this sector:

What can we help with?

  • Lean Consultancy & Training for Manufacturing & Service Businesses
    Whether you are a manufacturer or service provider, we can help your company reduce organisational waste through process improvement and simplification.
  • Six-Sigma Deployment Consultancy
    We provide internationally-recognised Black Belt, Green Belt and Yellow Belt training, as well as project management mentoring and delivery consulting.
  • Business Process Improvement
    By focusing on customers, Lean Six Sigma improves quality, performance and profitability through simple and advanced process improvement methodologies.
  • Strategy and Policy Deployment
    We help businesses improve strategy and policy deployment, allowing clients to focus, better define their objectives and deliver valuable ‘Vital Few’ initiatives.