Welcome to The Neill Group (TNG)

Established in 1987, The Neill Group (TNG) are New Zealand’s leading field agents, private investigators, repossession agents, security professionals and process servers (legal document servers). Using our significant knowledge of people, locations, information caches and organisations, we are able to effectively deliver our range of services anywhere in the country from Kaitaia to Bluff.

Results driven and service focused since 1987.


Private Investigations

Our nationwide team of government licensed private investigators provide a range of discreet private investigation services, including covert surveillance and intelligence gathering.
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Field Services

We provide a national field based service using the latest technology. Our field agents and licensed repossession agents carry out tracing, interviews, asset recoveries (repossessions) and floor plan audits.
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Professional Training

Our facilitators throughout New Zealand are qualified and experienced. We deliver specialised training and professional skill development seminars in safety, security and leadership (NZIML certified).
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Process Serving

We operate New Zealand's largest team of experienced process servers (legal document servers). We provide fast and cost-effective legal document serving in every region of New Zealand.
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Specialised Security

Protecting people and reputations since 1987! As government licensed security providers, we specialise in delivering high-level security, close personal protection and risk management services.
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Who is The Neill Group (TNG)?

The Neill Group (TNG) carefully select their people for their expertise, resilience, and unique skill set. Every member of our team contributes to a significant resource of collective experience gained from the defence forces, intelligence, and law enforcement sector. We act within the law at all times, and are governed by a strict code of ethics and professional standards.

Our 35 years of experience and track record of success offer our clients peace of mind.

Why use The Neill Group (TNG)?

Information Technology

We have access to a number of information sources, we also utilise the latest technology to support our field based team throughout New Zealand.

Industry Professionals

The team at The Neill Group (TNG) are the best in the industry. Our people are sourced from the defence forces, intelligence and law enforcement sector.

Unequalled Experience

When experience matters, Dion and his team have been providing legal support, field services, private investigation and security risk management since 1987.

Nationwide Services

The Neill Group (TNG) operational capabilities are extensive; we provide our range of professional services across every area and region of New Zealand.

International Resources

Dion Neill is a member of ASIS and the World Association of Detectives. The Neill Group (TNG) have unlimited access to international resources.

Client Confidentiality

You can be assured that we are committed to safeguarding your privacy, identity and information. We utilise a number of I.T. and security tools to ensure compliance.

Government Licensed

Dion Neill trading as The Neill Group (TNG) has been government licensed since 1987 as security providers, private investigators and repossession agents.

Security Risk Management

The Neill Group (TNG) operates in accordance with the New Zealand and Australian security risk management framework.

Quality Assurance (QA)

The Neill Group (TNG) utilises a recognised quality assurance programme to provide the foundation for business continuity and operational capability.

We had Dion Neill coach our nationwide team of field based agents on strategies to manage conflict that will help keep them safe. The feedback was resoundingly positive and now being implemented every day.


We engaged Dion Neill to provide corporate security and risk management services. Dion and his team were very discreet and professional, we have no hesitation in using their services again.


We use The Neill Group for tracing, process serving and investigations, they are efficient and always produce exceptional results.

Simpson Western

Westpac utilized the services of Dion Neill to assist our national fraud and security services team. I highly recommend Dion and The Neill Group, they are reliable and very professional.


We have used The Neill Group for process serving on a number of occasions, we have always been impressed with their efficiency and professionalism.

White Fox & Jones Lawyers

Dion has a can do attitude and his drive and persistence provides the best possible outcome for his clients

True Results

Dion Neill and I have worked together since the late 1990s in a number of roles including event security, close personal protection, and private investigations. I have also engaged Dion as a specialist instructor for executive protection training for my security staff. Dion constantly delivers a high level of skill and performance. It is refreshing to be able to task and forget knowing the job will be completed to my expectations. I have no hesitation in recommending any service Dion has to offer as I know the professionalism and depth of knowledge that underpins it

First Contact

I have been utilizing the services of The Neill Group in the Wellington area for several years now and am VERY happy with the service which Dion and his team provide. They operate in a very professional manner and the work is always completed in a timely way. I have no hesitation at all in recommending Dion Neill for assistance which you may require

Avon Investigations

We appointed Dion Neill to act as our New Zealand agent several years ago. We have trusted Dion and his team with the safety and security of our clients who travel to New Zealand from various countries around the world. Dion has earned an excellent reputation for his high standard of professionalism, security management, operational planning and natural ability to think outside the square.

Clearwater Projects (UK)

I’ve worked with Dion over the last 3 years. Every time that I have engaged his services, he has been responsive and has completed the job quickly. His reporting is done in a timely fashion. Dion is great to work with, reliable and responsible