The Neill Group (TNG) is a reputable Wellington based agency with over three decades of experience providing a range of nationwide professional services from Kaitaia to Bluff. TNG operates the largest network of field agents, private investigators, surveillance operatives, security professionals and process servers (legal document servers) throughout New Zealand.

TNG utlises the expertise and skill set of contracted associates sourced from the military, intelligence and law enforcement sectors. TNG are industry leaders who are committed to providing the highest level of service and a unique value proposition to legal, commercial and selected private clients.

TNG’s core values of experience, commitment and integrity are the important qualities we demonstrate to every client regardless of their size or stature. TNG was founded by Dion Neill who is a former member of the emergency services and New Zealand defence forces.


Wellington & New Zealand Wide Services
  • Field Visits
  • Surveillance
  • Legal Support
  • Document Serving
  • Asset Recovery
  • Risk Management
  • Professional Security
  • Personal Protection
  • Corporate Investigations
  • Intelligence Gathering
  • Fraud Investigations
  • Theft Investigations
  • Commercial Investigations
  • Private Investigations
  • Process Serving (Legal Document Serving)


The Neill Group Hero


Private Investigation

Our licensed private investigators are typically employed by private, commercial and government clients to investigate workplace theft, complex fraud matters and sensitive personal issues, including the tracing of missing family members, covert surveillance and confirming suspicions of infidelity (cheating partners).

The Neill Group carries out a range of private investigation services in the greater Wellington region and throughout New Zealand using only qualified licensed private investigators, surveillance operatives and certified fraud examiners.

Our licensed private investigators are discreet, resourceful and committed to achieving the best possible outcome for every client regardless of size or stature. At TNG, we have the necessary experience to meet your private or commercial investigation requirements anywhere in New Zealand.

Process Serving (Legal Document Serving) 

TNG provides cost-effective serving of all court proceedings and legal documents, including summonses, demand notices, trespass notices, dissolution of marriage (divorce) applications and other time-critical documents in Wellington and throughout New Zealand.

TNG are authorised to serve New Zealand court documents pursuant to Section 25(1) of the summary proceedings act 1957. TNG is an approved process serving agency to serve charging documents and criminal proceedings on behalf of government agencies.

With time sensitive legal documents and a fast approaching court deadline, you need a process serving team that you can rely on to get the service completed, quickly and diligently. Our dedicated process servers throughout New Zealand will provide you with constant communication throughout the entire process, your instructions are managed with the strictest confidence.



Field Services

A personal visit by a professional field agent is an effective method to engage with debtors and to ensure compliance of legal or contractual obligations. Our nationwide field team can verify information, locate hidden assets and detect credit fraud or identity theft. A key to our success is a structured process utilising professional Field Agents who are “street savvy” and commercially astute with the ability to communicate with people at every level.

Our field agents possess the experience to deescalate conflict and negotiate a solution that will work for you. We are engaged to assist organisations in the field to interact with people who respond best to a personal field visit, including people with addiction or mental health issues. We have worked in sensitive environments that require additional care because of potential brand or reputation damage.



Cant locate your debtor or defendant? We can help! The Neill Group has a network of licensed private investigators with experience successfully locating missing people. Our industry leading methodologies and unbeatable experience allows us implement appropriate tracing methods to obtain current information to assist with service of legal documents or debt collection efforts.

Protective Services is a Wellington based security company with a team of highly-trained security guards, crowd controllers, personal protection officers and risk management specialists. Protective Services not only provides trained licensed security guards, the company has earned an excellent reputation for providing high-level of protection to celebrities, executives, film talent, music artists and international sports teams.

Protective Services Limited has been granted the use of the New Zealand Made trade mark as a trusted mark of authenticity (licence number 806934).

Whether your security requirement are within New Zealand or internationally, Protective Services can provide you with a level of security and protection delivered by former members of the New Zealand Police Diplomatic Protection Squad (DPS) and specialist members of the Armed Forces, including the Special Air Services (SAS).

For more information, please visit the dedicated website of Protective Services 


Code 1 Limited provides qualified event medics within the greater Wellington region and throughout New Zealand. Code 1 has a number of paramedics available to provide first aid and emergency care at any public event or private function. Code 1 has also provided medical teams for celebrities, music artists and film talent.

Our highly skilled medics have decades of front line experience with St John or the Wellington Free Ambulance. All of our contracted paramedics must provide an authority to practice or have gained a recognised qualification to provide first aid coverage. Providing qualified medics and professional security teams will assist to mitigate and manage any risk to your event or function.

For more information, please visit the dedicated website of Code 1 



The Neill Group and Protective Services was founded by Dion Neill who has over 30 years of experience as a private investigator, security provider and risk management consultant. Dion has received training in military weapons, close quarter combat and self defence (krav maga).

Dion is a former member of the emergency services and New Zealand defence forces. Dion is a proud recipient of the St John long service medal, New Zealand defence service medal and long service award from the Wellington Free Ambulance.

In the late 1980’s, Dion was a member of a team employed to investigate a major organised theft syndicate operating within a national business. As a result of Dion’s evidence, over 20 offenders were convicted and a criminal network was disestablished (Dion also survived cross examination by the late Mike Bungay QC).

Dion was also one of the first licensed private investigators in New Zealand to carry out investigation assignments on behalf of the Accident Compensation Corporation (ACC). Dion has spent decades conducting surveillance, managing undercover operations and focusing on the investigation of theft and fraud.

Dion is a former certified fraud examiner with a diploma of security and risk management along with a certificate of investigation skills from the private training establishment of the Royal New Zealand police college. Dion has achieved the highest credentials in security and risk management available in Australasia.

Dion was tasked in 1987 to protect a Wellington business owner from serious threats of violence, this assignment was the catalyst for Dion to launch Protective Services Limited. Dion has worked within international high-risk environments, he managed the security for a New Zealand representative sports team in South Africa.

Dion also established a security business that was later acquired by Group 4 Security (G4S). Dion accepted a senior management position with G4S, he was responsible for over 200 operational security staff.

Dion has protected the rich and famous, including Sting, Bardot, Eminem, Jamie Oliver, Tony Hawk, Sir Elton John, Sir Peter Jackson and Film Talent from the Lord of the Rings Trilogy. Dion featured on the highly popular TVNZ series, ‘Private Investigators’ and the TVNZ Breakfast show regarding ‘protecting high profile people’ in New Zealand.



Our agents and associates must sign a confidentiality agreement prior to deployment on any operational assignment. Trust is an important element of our client relationships and our people understand the seriousness of breaching this agreement.


Government Licensing

The Neill Group is the trading entity of Dion Neill who is government licensed as a private investigator, security consultant, repossession agent, personal security guard, property security guard, crowd controller and confidential document destruction agent.

The Neill Group only engages contractors (agents and associates) for private investigation, security and repossession assignments who hold a current licence issued by the Ministry of Justice (Private Security Personnel Licensing Authority).

We comply with the Private Security Personnel and Private Investigators Act 2010. The Neill Group and Protective Services are Ministry of Justice – PSPLA (Private Security Personnel Licensing Authority) approved trading names of Dion Neill. Protective Services Limited was granted a company licence in 2020 to carry out security and private investigation activities.



Professional Memberships

Dion Neill was a foundation and executive member of the New Zealand Institute of Professional Investigators (NZIPI) until his resignation in 2020.

Dion is a current member of the following professional organisations:

  • ASIS International
  • World Association of Detectives
  • New Zealand Security Association


Process Servers, Private Investigators & Security Professionals Since 1987