Dion Neill is one of New Zealand’s most qualified and experienced licensed private investigators.

TNG provides a seamless Wellington and nationwide private investigation service with a network of former detectives and police officers who have decades of experience investigating criminal matters.

Our Wellington and New Zealand licensed private investigators assist selected commercial, government and private clients with the investigation of theft, fraud, infidelity (suspected cheating partners) and other sensitive matters.

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

Private Investigations

TNG Wellington and New Zealand based private investigations are conducted with the highest level of discretion and professionalism. At TNG, our job is to gather evidence and deliver the facts.

TNG uses modern technology and investigative techniques to complete our tasks with formidable expertise.

Child & Youth Investigations 

TNG provides surveillance to determine what happens when a parent or caregiver is with their child. TNG can confirm if a parent or caregiver engages in activities that would directly affect a child’s welfare.

Evidence by TNG private investigators is widely accepted for custody and child protection matters in the family court.

Insurance Investigations 

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.

TNG can assist you to confirm the validity of insurance claims or to investigate a claimant is misrepresenting the facts.

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.

TNG has 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. TNG’s  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? TNG private investigators will provide the evidence to help protect you and your loved ones.

The factual evidence provided by TNG private investigators are often used for the basis of a complaint to police.


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.

TNG has a trained surveillance and experienced undercover agent ready for deployment in Wellington or anywhere in New Zealand.


Some people intentionally go missing because of illnesses like anxiety and depression. Others go missing when they become a victim of a crime.

TNG private investigators are compassionate and highly resourceful. They use a range of proven investigative services like field calls along with online data mining to gather information on a person’s whereabouts.

TNG will assist you to find the missing pieces, employing a private investigator will open new avenues of inquiry that may lead to a positive result.

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 unauthorised 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.

Contact TNG in confidence to discuss your investigation needs, we will provide you with the evidence so you can make an informed decision and give you the peace of mind you deserve.

The Neill Group are based in Wellington with a strategic network of nationwide licensed private investigators, legal process servers (document servers), field agents, repossession agents and security specialists in every area, 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