TNG (The Neill Group) operates a network of Field Agents, Private Investigators, Security Professionals and Legal Document Servers throughout New Zealand. TNG are committed to providing service excellence by utilising the experience and unique skill set of their associates who are sourced from the military, intelligence and law enforcement sectors.

TNG is a Wellington based agency with over three decades of experience providing field services, specialised security, private investigations and process serving (legal document serving) in Auckland, Wellington, Christchurch and throughout New Zealand.

Our three core values are: experience, commitment and integrity, these are the important qualities we demonstrate to every client regardless of size or stature.

Nationwide Services

  • Field Services
  • Asset Recovery
  • Risk Management
  • Para-Legal Support
  • Specialised Security
  • Private Investigations
  • Close Personal Protection
  • Process Serving (Legal Document Serving)


TNG was founded by Dion Neill, a former member of the New Zealand military and emergency services. Dion is the co-founder and a former director of Venue Security (Wellington) Limited and Wellington Investigations Limited.

Dion commenced his career in the New Zealand security and private investigation industry in 1987 as a contractor to Nationwide Investigation and Security Group Limited (formally New Zealand Security Consultants and Investigations Limited).

Dion is a former Certified Fraud Examiner (CFE) with a Diploma of Security and Risk Management (Australia). Dion also has a certificate in investigation skills awarded by the Royal New Zealand Police College along with Australian and New Zealand recognised certifications in security, personal protection and security risk management.

In the late 1980’s, Dion was a member of a team employed to investigate a theft within a high-profile national business. As a result of Dion’s work and evidence, over 20 offenders were subsequently convicted in the High Court of New Zealand (Dion survived cross examination by the late Mike Bungay QC who represented the defendants).

Dion was also one of the first licensed Private Investigators to carry out assignments for government insurance agency, Accident Compensation Corporation (ACC). Dion featured on the highly popular television New Zealand series, ‘Private Investigators’ and was interviewed on New Zealand’s TV One Breakfast programme regarding protecting high profile people (bodyguards) in New Zealand.

Dion has represented the security industry for over 30 years in the media, he is a foundation and executive member of the New Zealand Institute of Professional Investigators (NZIPI).

Government Licensing

TNG - The Neill Group - Dion Neill - Licensed PI

The Neill Group (TNG) is the approved trading entity of Dion Neill – Licensed as a Private Investigator, Security Consultant, Repossession Agent, Personal Security Guard, Property Security Guard, Crowd Controller and Confidential Document Destruction Agent.

TNG only engage contractors for private investigation, security and repossession assignments who hold a current licence issued by the Ministry of Justice – Private Security Personnel Licensing Authority.

Professional Memberships

Dion Neill is a current member of the following professional organisations:

  • ASIS International
  • World Association of Detectives (W.A.D.)
  • New Zealand Security Association (NZSA)
  • New Zealand Credit & Finance Institute (NZCFI)

Dion is also a foundation and executive member of the New Zealand Institute of Professional Investigators (NZIPI)

World Association of Detectives ASIS International Member - New Zealand  NZIPI - Dion Neill - MemberNZCFI - Dion Neill - Member


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 agents understand the seriousness of breaching this agreement. Our nationwide agents and international associates have experience working within confidential environments and respect the privacy of our clients.

TNG Field Agents & Licensed Repossession Agents - Wellington

Field Visits & Asset Recoveries (Repossessions)

A visit by a Field Agent has proven to be an effective way to re-engage with clients or debtors and to ensure compliance of contractual and legal obligations. TNG provides nationwide Field Agent services to a number of commercial clients with exceptional feedback regarding the high-level execution of our nationwide professional services.

TNG will not engage in any repossession activities that includes the repossession of household chattels or personal property used as security on loan agreements or lending contracts.

TNG Licensed Private Investigators - Wellington Private Investigations

Private Investigations 

Private Investigators are also commonly referred to worldwide as PI’s, Private Eyes or Private Detectives. Private Investigators are typically employed by  private, commercial and governmental clients to investigate theft, fraud, workplace dishonesty and sensitive personal matters.

TNG carries out private investigation assignments in the greater Wellington region and across New Zealand using only experienced Forensic Experts, Private Investigators, Certified Fraud Examiners (CFE) and Surveillance Operatives.

TNG utilises the unique skill set and operational experience of former qualified Police Detectives for all private, commercial and government investigations in Wellington and throughout New Zealand.

TNG Protective Services - Professional Security & Risk Management

Specialised Security 

Protective Services works in collaboration with TNG to provide high-level specialised security, personal protection and associated risk management. Protective Services provides clients with professional security for VIP events, private functions and corporate meetings along with the personal protection of visiting celebrities, film talent, sports teams, corporate executives, court witnesses and high-net worth individuals.

Visit the website of Protective Services 

TNG Process Servers - Legal Document Serving - Wellington - New Zealand

Process Serving (Legal Document Serving) 

Dion Neill served his first legal document in 1986! Our Process Servers (Legal Document Servers) in Auckland, Wellington, Christchurch and throughout New Zealand serve legal documents and court proceedings, including: demand notices, eviction notices, trespass notices and dissolution of marriage applications.

Our regional based Process Servers utilise their local knowledge to serve documents across every district and region of New Zealand from Kaitaia to Bluff. This valuable insight provides a beneficial edge in carrying out instructions with a high degree of efficiency using decades of gathered intelligence.

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New Zealand & International Services

TNG are based in Wellington with a nationwide network of Field Agents, Private Investigators, Security Professionals and Process Servers (Legal Document Servers) in every district and region of New Zealand, including:

Northland, Whangarei, Auckland, Wellsford, Warkworth, Orewa, Albany, Takapuna, Mangere, Manurewa, Pukekohe, Coromandel Peninsular, Thames, Waihi, Whangamata, Whitianga, Waikato, Hamilton, Te Awamutu, Cambridge, Huntly, Morrinsville, Matamata, Putaruru, Tokoroa, Otorohanga, King Country, Taumarunui, Te Kuiti, Waitomo, Bay of Plenty, Tauranga, Te Puke, Whakatane, Kawerau, Opotiki, Rotorua, Taupo, Turangi, Murupara, East Cape, Gisborne, Tolaga Bay, Tokomaru Bay, Ruatoria, Te Kaha, Taranaki, Wanganui, New Plymouth, Stratford, Hawera, Waitara, Inglewood, Manawatu, National Park, Waiouru, Taihape, Palmerston North, Marton, Bulls, Feilding, Ashhurst, Foxton, Horowhenua, Levin, Otaki, Kapiti, Waikanae, Paraparaumu, Paekakariki, Wellington, Plimmerton, Porirua, Tawa, Johnsonville, Upper Hutt, Lower Hutt, Wainuiomata, Hawkes Bay, Wairoa, Napier, Hastings, Havelock, Waipukurau, Dannevirke, Wairarapa: Featherston, Pahiatua, Masterton, Carterton, Greytown, Tasman, Nelson, Blenheim, Picton, Motueka, West Coast, Westport, Greymouth, Hokitika, Wanaka, Queenstown, Twizel, Alexander, Te Anau, Canterbury, Christchurch, Kaikoura, Ashburton, Southland, Timaru, Oamaru, Dunedin, Invercargill, Balclutha, Mossburn, Gore.