The Neill Group (TNG) team includes qualified former police detectives, senior police officers and government intelligence specialists trained to understand criminal minds and think laterally.  


The Neill Group (TNG)  is a privately owned security, private investigation and professional field services business that is trusted by respected major legal firms, government agencies, commercial clients and a number of high-profile organisations. We are chosen because of our solid track record of success since 1987, we are efficient in getting the results needed. We provide a rapid response and can develop a plan to manage the most complex problems. Our people act within the law at all times, and are governed by a strict code of ethics and professional standards.

The Neill Group, commonly referred to as 'TNG' operates three distinct operational units:

TNG Field Services - Field agents and process servers. We provide a seamless nationwide field service, including field visits, tracing, repossessions, asset recoveries, floor plan audits, debtor interviews, debt recovery services and process serving (legal document serving).  

TNG Investigations - Licensed private investigators, fraud examiners and surveillance specialists. Corporate, commercial and private investigation services in the greater Wellington, Wairarapa and Manawatu regions. 

TNG Security - Licensed security guards, security consultants, crowd controllers, event security teams and personal protection officers (bodyguards). Bespoke security, personal protection and risk management services delivered by security professionals in collaboration with Protective Services Limited.  

Each team member contributes to a huge resource of collective experience from the defence forces and law enforcement sector. All of our people are professionally trained and government licensed. They have been carefully selected for their proven resilience, unique skill sets and operational expertise. We offer our clients a genuine commitment to delivering exceptional service with integrity and the highest level of professionalism. No matter what it relates to, your enquiry will be treated in confidence, we work to safeguard clients from threats and risks to their family, assets, business and information.

TNG Field Services

A personal visit by a professional field agent is a proven method to ensure compliance of legal and contractual obligations. As licensed private investigators, The Neill Group provides a range of professional field services, including audits, surveillance, repossessions, asset recoveries and the investigation of criminal offences.

Our process servers (legal document servers) are ready to take on any challenge and work assiduously to deliver your dissolution of marriage (divorce) applications, legal documents and court proceedings, on time and respectfully. With hundreds of documents served in Wellington and in every region of New Zealand every year, you can be confident that we will personally deliver your legal documents, on time, every time.

TNG Investigations

Our nationwide team have significant experience with investigating private, criminal and commercial matters. They are highly efficient with investigating suspected dishonesty in a business or personal relationship, including theft, fraud and infidelity (cheating partners). The objective is always to reveal the truth and deliver the facts so you can make an informed decision without speculation or a lengthy game of deception.  

TNG Security   

Our associates at Protective Services are challenging the security industry's status quo by raising the benchmark for service delivery and professional standards. Protective Services provides licensed security guards, security consultants, crowd controllers, personal protection officers (bodyguards) and event security personnel. For more information, please visit the website of Protective Services - Professional Security. 

The Neill Group (TNG) - New Zealand's leading providers of security, private investigation, process serving (legal document serving) and professional field services in every region of New Zealand. 


The Neill Group is Wellington's leading providers of security, legal support, private investigation and professional field services. We operate the largest network of field agents, private investigators, security professionals and process servers (legal document servers) in New Zealand, with services from Kaitaia to Bluff. We also have an extensive global network of contacts, resources and confidential informants to provide solutions to particularly complex problems. Using our significant knowledge of people, locations, information and organisations caches, we are able to conduct discreet field assignments and private investigations.

Why us?

  • A number of our team members are sourced from the defence forces, intelligence community, law enforcement and private security sector.
  • We operate New Zealand's largest network of field agents, private investigators, security professionals and process servers (legal document servers).
  • Our people are vetted, police approved and government licensed; we carry out background and criminal history checks prior to their engagement. 
  • We are widely respected for our tenacity, knowledge and commitment to providing exceptional results with a high-level of service.
  • Our operational capabilities are extensive; we manage hundreds of nationwide security, private investigations and field assignments every year.

Introducing Dion Neill

Dion Neill is the founder and the driving force behind Code 1, The Neill Group and Protective Services, he is one of New Zealand's most experienced licensed private investigators and security professionals. Following many years contracting to various security and private investigation companies throughout New Zealand, Dion established The Neill Group to provide a range of nationwide security, private investigation, risk management and professional field services. 

Dion's career began with a period of service in the New Zealand defence forces, followed by training at the Royal New Zealand Police College, where he gained a Certificate in Investigation Skills. Dion has also been certified as a fraud examiner, and has achieved a Diploma of Security and Risk Management, along with other internationally recognised credentials in security, investigations and risk management. Dion has trained extensively with former police officers, qualified detectives, military personnel and government intelligence specialists. 

In the 1980s, Dion was assigned to protect a prominent Wellington business owner from serious threats of violence. This assignment was the catalyst for Dion to launch Protective Services to the market and further develop his interest in providing executive security and personal protection. A respected pioneer of the New Zealand security industry, Dion was influential in changing the government's licensing and training requirements for private security personnel. He remains a strong advocate for raising the benchmark of service delivery and professional standards within the industry.

In 1999, Dion moved on from the emergency services to accept a new challenge as a senior manager with Group 4 Security (known globally as G4S) until the company was acquired by Armourguard. In this role, he was responsible for leading a large security team and managing a number of key national contracts. You're in very safe hands! Dion and his trusted associates have worked as private security contractors in some of the world’s most volatile regions, including Asia, South Africa and the Middle East. In 1996, Dion personally managed the security for a New Zealand sports team on tour in South Africa.

Dion is a proud recipient of the New Zealand defence forces service medal, St John long service medal and long service award from the Wellington Free Ambulance. Dion has also been recognised for his contribution to the community as a volunteer first responder with the GoodSAM programme.  


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Ethics, Integrity & Professional Conduct
We operate with a strict code of ethics, integrity and professional conduct. 


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