A number of our private investigators and surveillance operatives are former qualified police detectives with significant operational experience. TNG provides clients with a high standard of private investigation services based on internationally recognised best practice.

TNG investigates workplace theft, complex fraud matters, suspected infidelity (cheating partners) and other sensitive assignments in the greater Wellington region and throughout New Zealand.

Need assistance? Struggling with a difficult personal or employment situation? Don’t risk getting into legal difficulties by trying to find the truth alone. TNG has the professional experience to answer your questions quickly, easily, and with discretion.

We suggest clients only instruct qualified and licensed private investigators who are current members of the World Association of Detectives or the New Zealand Institute of Professional Investigators.

Also known as private detectives, PI’s and private eye’s, private investigators typically work within the private, commercial and governmental sectors. Our licensed private investigators are widely used to investigate fraud, theft and workplace dishonesty along with sensitive personal matters such as infidelity (suspected cheating partners).

Our private investigation services, include, but are not limited to:

Domestic or Personal Investigations

  • Infidelity (suspected cheating partners)
  • Surveillance
  • Locating family members
  • GPS/Vehicle tracking

Legal Investigations & Support Services

  • Criminal defense
  • Civil litigation support
  • Process serving
  • Tracing
  • Interviews
  • Scene examinations
  • Forensics

Commercial Investigations

  • Fraud, theft and dishonesty
  • Covert (undercover) operations
  • Computer forensics
  • Bug sweeping
  • Trademark & IP inquiries
  • Covert cameras
  • Security consulting

Private Investigations

Our investigations are conducted with the highest level of discretion and professionalism. We use modern technology and investigative techniques to complete our tasks with formidable expertise. Every case we undertake is treated with the utmost sensitivity.

We appreciate that you are sharing your most private and sensitive matters with us and therefore we guarantee our clients 100% confidentiality. Private Investigations carries out investigations into a range of private, business and corporate matters including:

  • Serious misconduct
  • Whistle blower investigations
  • Breaches of operational policies
  • Workplace discrimination
  • Procurement processes including probity
  • Asset investigation in divorce matters

Child & Youth Investigations 

We provide surveillance to determine what happens when a parent or caregiver is with their child. We can confirm if a parent or caregiver engages in activities that would directly affect a child’s welfare. Formal evidence provided by our licensed private investigators is widely accepted for custody and child protection matters in the family court.

Insurance Investigations 

As a licensed private investigator and former Certified Fraud Examiner, Dion Neill has over three decades of experience investigating insurance claims throughout New Zealand. Injury and disability insurance claims can amount to substantial amounts of money which sometimes requires validation prior to any compensation or payment being made to ensure the entitlement is correct.

No matter what kind of insurance you are dealing with – health, property, fire, etc – TNG can assist. From verifying statements to scene examinations and evidential analyse, you can count on TNG to scrutinize any suspicious claims.

TNG can assist you to confirm the validity of insurance claims or to investigate a claimant is misrepresenting the facts – when your company needs evidence and facts for additional context during verification of a claim.

Corporate & Commercial Investigations 

TNG offers corporate and commercial clients comprehensive investigative services to gather evidence and safeguard your business interests. We understand how important it is to be aware of privacy breaches regarding clients, we investigate with professionalism, keeping your assets, people, information and relationships safe.

TNG licensed private investigators can uncover the truth of your situation, and advise you on how best to proceed from there, no matter what you’re dealing with. Our licensed private investigators can assist you with any concerns, including theft, fraud or general misconduct cases.

Harassment, Workplace Bullying, Grievances & Complaints

TNG has a team including private investigators with psychology degrees and legal qualifications. Our team of Wellington and nationwide licensed private investigators are skilled in obtaining evidence, being impartial and working through challenging issues in a fair and empathetic manner.

Fraud & Theft Investigations

Fraud inside a business or organisation frequently occurs through poor internal controls and processes, this allows a window of opportunity for people in positions of trust and responsibility to carry out offending such as theft or fraud.

We have earned an outstanding reputation for carrying out professional investigations on behalf of insurance companies, organisations and business owners.

Drug, Alcohol & Substance Abuse Investigations

Do you suspect your family member, partner or employee maybe using excessive alcohol, taking drugs or illegal substances? Did you know that if drugs are used on your property, you can be prosecuted for their criminal activity. Alcohol and drug abuse is known to be the source of criminal activity and the foundation of anti-social behaviour.

Our alcohol, drug and illegal substance investigations will help to provide the answers you are seeking.

Physical or Psychological Abuse Investigations 

Is someone in your life a possible victim of physical or psychological abuse? Our licensed private investigators will provide the evidence to help protect you and your loved ones. The factual evidence provided by our licensed private investigators are often used for the basis of a complaint to police.


Surveillance is a common element as part of many private investigation services, including corporate and commercial investigations, insurance fraud investigations and infidelity (suspected cheating partner) investigations.

Our team of highly experienced licensed private investigators includes former qualified detectives. We have the capability to work around the clock to provide you with the best possible results.

TNG has conducted surveillance across a range of matters including:

  • Infidelity
  • Custody disputes
  • Corporate crime and misconduct
  • Workers compensation, general and other insurance

Our surveillance services include:

  • 24/7 Operations
  • Latest communication and video technology including covert and distance cameras
  • Samples emailed to clients within hours of capture
  • Over three decades of experience in private, insurance, commercial surveillance including sensitive assignments, workplace theft and complex fraud matters.

Surveillance is a powerful tool used in investigations where evidence is obtained in order to secure prosecutions – substantial intelligence is often gained from these operations. The current measures of surveillance and intelligence gathering include insurance claimant surveillance, domestic related surveillance and surveillance for theft or fraud related investigations.

In the vast majority of surveillance cases, it’s essential to the client for the target to be unaware that they’re under surveillance. This is the second major cornerstone of successful surveillance, we ensure caution, prudence and confidentiality.


Some people intentionally go missing because of illnesses like anxiety and depression. Others go missing when they become a victim of a crime. Our licensed private investigators are resourceful, we use a range of proven investigative techniques like field visits along with online data mining to gather information on a person’s whereabouts.

Depending on how much information you have, and how long they have been gone, locating missing persons can be much faster than some might think. In many cases, contacting us and making use of our networks, contacts and databases will help you find the person in question faster than you’d expect.

Other cases can be much more challenging – when a missing persons case isn’t a simple database job, it can take significantly more effort to find them. This is especially true if an individual wishes to remain hidden.

Trade Mark & I.P. Infringements 

TNG are often instructed by legal firms to investigate infringements of branding, international copyright and trade mark patents along with the unauthorized use of logos and theft of intellectual property. Dion Neill has personally carried out extensive trade mark and I.P. investigations for a number of leading brands, including: Adidas, Armani, Microsoft, Nike, Playboy and Sony PlayStation.

Legal Support

Being a licensed private investigator doesn’t always mean taking covert photographs or carrying out surveillance on cheating partners. The team here at TNG work with barristers, solicitors and legal teams to obtain evidence, interview witnesses and serve legal documents.

TNG has over three decades of experience supporting the legal sector – we quickly uncover the truth and reveal the facts.

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.

TNG (The Neill Group) - Private Investigators - Wellington & Nationwide