Welcome to The Neill Group (TNG) - New Zealand's leading nationwide field agents, process servers, private investigators, repossession agents & security professionals.

The Neill Group (TNG) manages New Zealand’s largest team of field agents, process servers, private investigators, repossession agents and security professionals. We have over 100 years of collective experience as nationwide providers of process serving, private investigations, specialised security, risk management and field based services.

The Neill Group (TNG) delivers services to New Zealand and international clients within the private, commercial and governmental sector, including legal firms. We have established offices in Auckland, Hamilton, Wellington and Christchurch to support our field based team operating across every region of New Zealand from Kaitaia to Bluff.

Our people are governed by a strict code of ethics and professional standards. Each member of The Neill Group (TNG) contributes to a large resource of collective experience from the New Zealand defence forces, law enforcement and intelligence sector. They are carefully selected for their proven resilience, unique skill sets and operational expertise.

Large enough to matter, small enough to care.

Private Investigations

Dion Neill is one of New Zealand's longest serving private investigators. We provide surveillance, private investigation and intelligence gathering services.
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Field Services

We deliver nationwide field services including tracing, field visits, interviews, address verifications, debt negotiation, asset recoveries and floor plan audits.
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Document Serving

New Zealand's largest network of experienced process servers. We provide fast, reliable and cost-effective legal document serving from Kaitaia to Bluff.
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Professional Security

Not just security guards, our high-calibre security team are police and military trained. Contact us about our security, personal protection and risk management services.
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Who is The Neill Group (TNG)?

The Neill Group (TNG) is owned and operated by Dion Neill. He is a former member of the New Zealand defence forces and emergency services. In 1987, Dion commenced training with former police officers, military personnel, and intelligence specialists. In 2003, Dion featured on the popular television series, ‘Private Investigators’. He was also interviewed on TVNZ Breakfast regarding protecting high profile people.

Dion was one of the first private investigators to carry out assignments for the Accident Compensation Corporation (ACC). He provided evidence in the High Court relating to a lengthy and complex theft investigation. Dion’s evidence was instrumental in securing over 20 convictions. Dion has published articles on employee theft, fraud awareness, personal safety, executive protection and retail loss prevention.

Dion was certified as a fraud examiner (CFE), and awarded a Certificate in Investigation Skills by the private training establishment of the Royal New Zealand Police College, Dion achieved a Diploma in Security and Risk Management (Australia) along with a number of other credentials. Dion is a conflict management instructor, he was also one of the first NZQA qualified instructors to facilitate the national certificate in security.

Finalists – 2021 New Zealand Security Awards, 2022 & 2023 Outstanding Security Performance Awards (OSPAS).

Why use The Neill Group (TNG)?

Latest Technology

Our team use the latest technology to provide live updates from the field directly to our clients. We also use technology to keep our operational team safe and secure.

High-Calibre People

We select the best people from the defence forces, intelligence and law enforcement sector. Our people are highly skilled and professionally trained.

Unequalled Experience

Since 1987, we have remained committed to our stringent compliance, professional code of ethics and reputation for delivering results and service that is second to none.

Global Resources

Dion Neill is a member of ASIS International, New Zealand Security Association and World Association of Detectives. We have unlimited access to local and global resources.

Government Licensing

The Neill Group (TNG) are licensed by the Ministry of Justice (PSPLA) as security providers, private investigators and repossession agents in New Zealand.

Nationwide Services

We provide a nationwide service to suit the needs of every client. We are the experts in providing security, legal support, private investigations and field based services.

Dion Neill provided our company with advice on a number of security issues. Dion was worth every dollar spent, he is a very astute, personable and professional security consultant. The security processes now in place is a credit to him. I highly recommend Dion Neill as a security consultant to any organisation.

Chief Executive – Corporate Client

The Neill Group helped us to find a missing family member. We are very grateful for their professionalism and understanding, and for their fast, discreet service.


Vehicle Sales & Finance Limited have been outsourcing field assignments to The Neill Group. We have found Dion and his team to be professional and easy to communicate with. Their reporting and robust systems is comprehensive. Dion’s approach to our work and dealing with our customers is not an easy task, his team are professional, cost efficient, and their positive outcomes reflect their tenacity.

Sue Chapman, Managing Director – Vehicle Sales & Finance Limited

Dion is a highly skilled and experienced protective security and private investigations specialist. Dion has a proven track record of obtaining results for his clients ensuring operational success for the range of services offered by his companies.

Mike Hall, Embassy Security Project Manager

During my time at Credit Recoveries, Dion and his team were always diligent and professional with excellent service. They produced some great results and kept us informed throughout the entire process. I have no hesitation in recommending Dion and his team.

Kyle McElwain, Former CEO – Credit Recoveries Limited

Professional and highly organised, I always found Dion Neill a pleasure to work with, his enthusiasm and dedication is a cut above. His knowledge and standing in the security sector is second to none.

Charlie Rudd, General Manager – Mana Tangata

Avinash Kumar, Former Team Leader – Marac & Heartland Bank

I worked alongside Dion, from time to time, during his time at Wellington Free Ambulance and our paths also crossed in other business dealings. Whether at the scene of a car accident or in an office environment I always found Dion to have integrity, and be professional and easy to work with. He is very community minded and a supporter of Life Flight which is a charity that is close to my heart.

Dave Greenberg, Operations Manager & Rescue Helicopter Crewman

I worked with Dion over four years on a number of high profile events. Dion brings a high level of professionalism and experience which contributes to the success and development of the team and the event. Dion is always a pleasure to work with, highly trusted and respected.

Sean Hurndell, Commercial Manager – MPI

I had the privilege of knowing and working with Dion Neill since 1999. In that time Dion has been an inspiring leader, I have worked with Dion on many projects ranging from the defence cluster to crime scene protection. Dion’s attention to detail is second to none, he ensures that his clients needs are fully met. I would recommend Dion with the skills, attributes and honesty required of any security operator.

Selwyn Ponga-Davis, New Zealand Defence Forces

Dion Neill carried out a highly sensitive investigation assignment on my behalf. I found him to be discreet and professional, he was frequently able to update me with his progress. I appreciated his attention to detail, and consideration when it came to our safety and security. Dion has an incredible array of skills, and his experience gives him a unique insight into various situations. Dion provided outstanding service, I would strongly recommend Dion.


We have instructed Dion Neill to work with our field staff on a number of highly sensitive and confidential assignments. Dion applied a high degree of logic and intelligence to our assignments which resulted in a very positive outcome for all parties. Dion was always self disciplined, highly professional and relentlessly committed, he is a recognised expert in his field and respected by many of our team. The feedback we received was always favourable and complimentary of Dion’s diplomacy and finely tuned etiquette.

Anna Wiseman, Senior Consultant

Dion Neill and his security team attended our Antipodes party, an event attended by over 150 people. The security team were incredibly professional, I was personally impressed about how well dressed they were. This meant the security team seamlessly blended into the party, and were always mingling and ensuring everything went smoothly. We absolutely 100% recommend Dion Neill.

Elizabeth Barbalich, CEO & Founder – Antipodes New Zealand Limited

Dion was contracted to provide security on behalf of Sony Records (Australia) for the New Zealand tour of Bardot from the popular television series, Pop Stars. Thanks to the efforts of Dion and his wonderful security team, Bardot always felt very safe and secure.

Event Production Manager – Sony Records (Australia)

Dion Neill provided security on behalf of First Contact for Tony Hawk, Champion Skateboarder. The event management team were very appreciative of Dion’s excellent service.

Event Manager – Tony Hawk (New Zealand Tour)

Thank you for providing security to Jamie Oliver during his tour of New Zealand. We received excellent feedback, all credit must go to Dion Neill for his positive ‘can do’ attitude and level of professionalism.

Executive Manager – Jamie Oliver (New Zealand Tour)

Dion and his team were responsible for managing the security of the 2000 Olympic Torch Relay. On behalf of the Wellington City Council, thank you for your assistance with this event.


Delia Shanly, Event Manager – 2000 Celebrity Olympic Torch Relay

I have known Dion Neill for many years. He is a passionate business person focused on building and maintaining strong commercial partnerships. Dion has always been driven to search out opportunity and drive success strategically. This is a culture he instills in his team and can rely on to deliver win-win solutions for all those he works with.

Chris Wilkinson, CEO – First Retail Limited

Roy Assadi, Director of Operations – Hilton Hotel (Auckland)

I was lucky enough to have met Dion Neill while I was the Mayor of Wellington. I found Dion to be a person of high integrity and reliability. Dion is a true Wellingtonian who adds real value to the wider community.

Mark Blumsky (Former Mayor of Wellington)
Mike McRoberts, TV3 News Anchor

We have worked together with Dion and his team on many jobs and have always found it a pleasure to work together with them. They have proven to be professional, timely, thorough and eager to achieve the goals set out. Their communication and reporting is next to none, this gives everyone peace of mind in the knowledge their problems are being addressed.

Bryan Wotton, Security Consultant & Private Investigator

Dion Neill operated alongside me on a high-profile security operation. He is an accomplished security and protection specialist with a wealth of experience within the New Zealand security industry. Dion’s attention to detail, excellent communication skills and ability to motivate by giving confidence to personnel is a quality seldom seen today.

Graham Lockhart, Safety & Security Consultant

Dion Neill is fantastic at what he does and has built a solid team around him to enable flexible and competent security provision, which is exactly what makes Dion my go-to when it comes to security needs. He is friendly, easy to work with and knows his industry and team inside out. Highly recommended!

Hannah James-Johnson, Film & Television Production Manager

Dion Neill is a passionate operator who leads his team from the front, he is extremely focused on ethics and doing the right thing. A seasoned security professional, if you need a job done well and with a focus on a great customer experience, Dion is the man to contact.

Rob Snelling, Managing Director – Executive Transport Limited

Dion Neill has been a fantastic supporter of Life Flight for many years. Dion most recently went the extra mile providing security at no charge to keep our volunteers safe during our street appeal and helping move large volumes of cash safely, efficiently and professionally. Thank you Dion, really appreciate you having our backs!

Sebastian Grodd, Head of Fundraising, Marketing & Communications – Life Flight

We haven’t seen our Brother for around 10 years, we needed to find him as our father was terminally ill. Dion Neill showed great urgency to our request, he was very professional with great communication. After a lot of hard work and really good initiative, Dion located our Brother in just 1 working day! His rate for this work was very fair and reasonable.

Kerry & Nicole

The security services provided by you were of a professional nature and were commented on favourably by all delegates, in particular, those from overseas.

Executive Director – New Zealand Defence Industry Association (NZDIA)

Thank you Dion, you made it safe for us to enjoy the beauty and wide open spaces of New Zealand. It was truly a remarkable experience for us all, we are sincerely grateful for your assistance.

International Celebrity

We have trusted Dion with the safety and security of our clients who travel to New Zealand from all over the world. Dion has earned an excellent reputation for his high standard of professionalism, security management, operational planning and ability to think outside the square.


Kevin Horak, CEO – Clearwater Special Projects (United Kingdom)

Dion Neill and his team provided extensive security and risk management services to A24 (LA) and Apple TV productions. Dion and his team were personable and very professional, he comes highly recommended with endorsement by the New Zealand and international film industry.

Laura Matthews, Transport & Logistics Manager – A24 & Apple TV.

Dion is very professional, and excellent communicator. Dion provides security to the highest standard, I definitely recommend Dion for any security assignment.

Jo Hiles, Film & Television Producer

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


Kieran Stott, Operations & Compliance Manager – DebtManagers Limited

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 him again.

Executive Manager – Meridian Energy Limited

We regularly utilise the services of The Neill Group for tracing, process serving and investigations, they are efficient and always produce exceptional results.

Legal Executive – Simpson Western Lawyers

Westpac utilised the services of Dion Neill to assist our national fraud and security team. We highly recommend Dion, he is reliable and very professional.

Grant Henderson, Fraud & Security Manager – Westpac New Zealand Limited

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

Legal Executive – White Fox & Jones Lawyers

I have worked with Dion Neill since the late 1990s. Dion is engaged to provide event security, personal protection, and private investigations. I have also contracted him as a specialist instructor for executive protection training to our staff. Dion constantly delivers a high level of skill and performance, I have no hesitation in recommending Dion as I know the professionalism and depth of knowledge that underpins it.


Darryl Stonnell, Managing Director – First Contact Limited

I have been utilising the services of Dion Neill and The Neill Group for several years. They operate in a very professional manner and the work is always completed in a timely way.

Verdi van Beek, Managing Director – Avon Investigations Limited

I have worked with Dion Neill for over 5 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.

Kelly Baya, Managing Director – iServe Limited

It was a pleasure to work with Dion Neill at the Cuba Street Carnival who fulfilled his role as our contracted event security manager in a highly professional manner. The event, from a security point of view, ran smoothly and we will certainly look to work with Dion again.

John Page, Event Director – Cuba Street Carnival

Intercoll has enjoyed a very strong relationship with Dion Neill and The Neill Group for over 10 years. We find Dion and his team to be professional in all of their activities, I am personally impressed with their results, communication and reporting systems.

Mark Francis, General Manager – Intercoll Limited

We contracted Dion Neill to provide field services throughout New Zealand. Dion and The Neill Group are extremely reliable and hardworking, their work has always been of an excellent quality and very professional.

Senior Manager – Bluestone Mortgages (Australia & New Zealand)

A+ for Dion Neill who set the new benchmark as our security provider. We use Dion’s services for our tours in Australasia, he is the consummate professional. Dion is well skilled, resourceful and has mastered the ability to deliver security to a very high-level.

Tour Manager – International Music Artists