Field Agents, process servers, security specialists & PRIVATE INVESTIGATORS - auckland, wellington, christchurch & new zealand wide

Wellington's leading provider of private investigations, legal document serving and professional field services.

We focus on delivering the right service, solution and information to provide clarity, certainty and peace of mind.


Established by Dion Neill, The Neill Group is a family owned and operated business located in Wellington with regional offices in Auckland and Christchurch. We operate New Zealand's largest network of field agents, private investigators, repossession agents and process servers (legal document servers), with services provided from Kaitaia to Bluff. We also have an extensive global network of resources to provide solutions to complex problems. Using our significant knowledge of people, locations and information caches, we are able to conduct discreet investigations and field based assignments. 

Dion Neill is Wellington's longest-serving private investigator and one of New Zealand's most experienced security professionals. His career began with a period of service in the New Zealand defence forces, followed by advanced training with former members of the military, intelligence and law enforcement sector. During his time at the Royal New Zealand Police College, he gained a Certificate in Investigation Skills. Dion was a Certified Fraud Examiner, and achieved a Diploma of Security and Risk Management along with a number of other internationally recognised credentials in security, investigations and risk management.

Why The Neill Group?

  • We have 30 + years of operational experience throughout New Zealand and internationally.
  • Our people are sourced from the defence forces, intelligence and law enforcement sectors.
  • The Neill Group is licensed to provide security, investigation and repossession services.
  • We have access to certified fraud examiners, forensic specialists and highly-trained surveillance operatives.
  • Our people have a high-level of EQ - we treat people with respect, empathy and a balanced level of firmness.
  • We use the latest GPS technology and file management software to provide live updates in real time from the field.
  • The Neill Group operates New Zealand's largest network of field agents, process servers and licensed private investigators.
  • We apply robust processes, methodologies and standard operating procedures based on recognised best practice.

Our top 10 nationwide services

  • Tracing 
  • Field visits
  • Interviews
  • Surveillance
  • Asset recoveries
  • Intelligence gathering 
  • Legal document serving 
  • Security and risk management 
  • Commercial and private investigations 
  • Fraud, theft and dishonesty investigations

Our team of professionals throughout New Zealand includes former detectives and police officers trained to understand criminal minds and think laterally.


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Trust is an important element of our client relationships. Our agents and associates must sign a confidentiality and non-disclosure agreement prior to deployment on any operational assignment. We will not disclose the details of our clients or assignments unless required to do so by the police or Court order. 

Paying it forward

We are committed to paying it forward by supporting community-based charities, including Starship, Life Flight Trust, CrimeStoppers, Ronald McDonald House and Flashlight (supporting first responders through PTSD).  Dion Neill is a volunteer first responder, he was a member of St John and the Wellington Free Ambulance for many years. 

Our memberships

Dion Neill was a foundation and executive member of the New Zealand Institute of Professional Investigators. We are current members of ASIS International, New Zealand Security Association, World Association of Detectives and the World Association for the Service of Process.

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We cover nationwide  

We offer a nationwide service with over 40 agents covering every region, including: Paihia, Russell (Bay of Islands), Whangarei (Northland), Auckland, Hamilton (Waikato), Tauranga (Bay of Plenty), Opotiki, Whakatane, Rotorua, Taupo, Turangi, Hawera, New Plymouth (Taranaki), Gisborne (East Coast), Napier, Hastings, Dannevirke (Hawkes Bay), Whanganui, Palmerston North, Levin, Otaki (Manawatu), Waikanae, Paraparaumu, Paekakariki (Kapiti), Featherston, Greytown, Martinborough, Carterton, Masterton (Wairarapa), Wellington, Lower Hutt, Upper Hutt, Porirua, Blenheim (Marlborough), Nelson (Tasman), Greymouth (West Coast), Christchurch, Ashburton, Timaru, Oamaru, Dunedin (Otago), Queenstown and Invercargill (Southland).

What do our clients say?

Please view our client testimonials page for more information. Dion Neill was a finalist for the 2021 New Zealand Security Awards. We have received 5 star reviews with Bark, Google, Trustpilot, #1 Wellington Private Investigators from Top Reviews , #1 Best Private Detectives from Star of Service and Best Process Servers Companies in New Zealand.  

        Testimonials - DSPTECH           Yachts and Boats Rental in Dubai - Gold's Yacht   celebra il Giorno della Tolleranza - Positanonews          topreviews

Links to articles

We featured on

Dion Neill has contributed to TV3 News,  Channel 9 Australia (A Current Affair), TVNZ and Sky Television (Private Investigators) and TVNZ Breakfast Show (Protecting People at Risk). Dion has featured in Stuff, Law Talk Magazine (NZ Law Society), Security Oz Magazine, AA Directions Magazine, The Investigator (Australia) Magazine, New Zealand Security Magazine, The Dominion Post and The New Zealand Herald.  

  1 News - Wikipedia       Jeremy Sutton – Divorce Lawyer   3News - Mobile app developed by Moa Creative A Current Affair Official Website 2021 | Exclusive Content, Latest News, Videos and More -         nine-logo - Switzer Report        File:Sky Crime logo 2019.svg - Wikipedia     stuff-logo  The Dominion Post — MJT Property Styling

Repossession & Field Agents - Asset Recovery & Field Visits

We provide a range of field agent services, including: audits, field visits, interviews, chattel inspections and identity verifications.

As licensed repossession agents, we are engaged to recover assets and motor vehicles that are subject to a loan or finance agreement.  

We have experience working  in sensitive environments. We can safeguard the integrity of your brand, company and reputation.

Private investigators - Wellington Investigations

Dion Neill is Wellington's longest serving field agent, process server and private investigator.

A number of our experienced private investigators are former detectives and police officers with significant investigation experience.

We have been catching thieves, fraudsters, hackers, scammers and cheating partners for decades. We are the experts in surveillance, investigations and intelligence gathering. 

Security Professionals - Risk Management

Our licensed security consultants provide security consulting and risk management services to private, commercial and government clients throughout New Zealand.

Our past experience includes the protection of film talent, music artists, sports teams, court witnesses and corporate executives. If you require reliable, highly-trained and licensed security guards, we recommend Platform 4 Group (P4G) in New Zealand.

The Facts

  • The Neill Group operates New Zealand's largest network of field agents, document servers and licensed private investigators.
  • We use the latest GPS technology and file management software to provide our clients with live updates in real time from the field.
  • Our private investigators apply investigation methodologies based on recognised best practice with standard operating procedures.
  • We engage people are sourced from the New Zealand security, defence forces, law enforcement and government intelligence sectors. 
  • Dion Neill trading as The Neill Group is licensed in New Zealand by the Private Security Personnel Licensing Authority (PSPLA). 
  • We have 30 + years of operational experience throughout New Zealand and internationally.

Licensing & Compliance 

The Neill Group is the approved trading name for Dion Neill (licence holder number: 11-000153). Dion Neill is licensed by the Private Security Personnel Licensing Authority (PSPLA) to provide security, asset recovery (repossession) and private investigation services in New Zealand.  

Our contracted field agents, security consultants, private investigators and repossession agents throughout New Zealand hold a current licence and certificate of approval. Dion Neill is authorised by the courts to serve criminal documents pursuant to the Summary Proceedings Act 1957. 

We have engaged in the implementation of a recognised quality assurance programme to provide the framework for our business continuity, operational and management requirements. Our extensive QA  framework also delivers a layer of service, accountability and transparency for our clients.

The Neill Group complies with legal, regulatory and legislative requirements, including the New Zealand Private Security Personnel and Private Investigators Act 2010.  Our security services operate within the New Zealand Government Protective Security Requirements (PSR).

Community Support

Community - Action Tyres   Police Dog Trust   Crime Stoppers Launch Illegal Firearm Campaign   Wellington Free Ambulance - Business and supporters

Professional Memberships