PRIVATE  INVESTIGATORS & surveillance specialists 


We have been catching abusers, thieves, fraudsters, online scammers and deceptive partners in Wellington and throughout New Zealand since 1987.


Dion Neill is Wellington's longest established private investigator, he is supported by former detectives, police officers and intelligence specialists. Our Wellington and New Zealand wide private investigators often work on legal, civil and criminal cases. In our industry, experience matters, we have decades of experience working for clients who demand the very best investigation services. The evidence obtained during our investigations are presented in the district court, family court and high court of New Zealand. Dion Neill is widely recognised by the courts as an expert witness. Over many years, Dion has provided testimony in high-profile and significant prosecutions before the courts.

We urge you to act with caution, not all private investigators in Wellington are equal, we have discovered our competitors using fictitious Google reviews in an effort to gain credibility. We suggest you ask your chosen private investigator for proof of their credentials and relevant professional qualifications. In New Zealand, all security providers and private investigators must be licensed by the Ministry of Justice (Private Security Personnel Licensing Authority). Your private investigator should produce his PI licence (please note: a certificate of approval is not a PI licence). If in doubt, contact the Ministry of Justice or visit the online private investigators licence register at PSPLA.

Our team includes respected private investigators who are former detectives, police officers and intelligence specialists. 


Commercial investigations

We offer commercial clients a comprehensive investigation service to gather evidence and safeguard their business interests.

Our modern technology, advanced  investigative techniques and formidable experience enable us to take on every type of investigation assignment.  

As a client, you are our first priority and recovering losses on your behalf is one of our key objectives. We obtain factual information and evidential statements from offenders, witnesses and people of interest. 

An experienced financial fraud investigator or commercial investigator can assist you with any concern, including criminal activity and misconduct cases.

We investigate with professionalism to keep your people, assets and reputation safe.

Worldwide tracing 

We use proven investigative techniques, including data mining to gather information on the whereabouts of a missing (or hiding) person.

Depending on how much information you have, and how long the person of interest has been gone, tracing a missing person can happen much faster than you think.

Of course, some assignments are more challenging. When a missing persons case is not a simple database job, it may take significantly more effort to locate them.

We have a solid track record of successfully locating people anywhere in New Zealand and internationally.

We assist charities and volunteer social agencies on a pro bono basis to trace birth parents and family members. 

Drug, substance & psychological abuse investigations

Do you suspect your partner, family member or employee is consuming excessive alcohol, taking drugs or using illegal substances?

Substance abuse, including drugs and alcohol known to be a foundation of criminal activity and anti-social behaviour. 

We also investigate cyber (internet) bullying and harassment which could be effecting you or someone you know. 

If you suspect someone close to you is the victim of physical or psychological abuse our private investigators will provide the evidence you need. We can also help to mitigate any risk to family members. 

Health & disability insurance investigations

In the late 1980s, Dion Neill was one of the first private investigators in New Zealand to carry out investigation assignments on behalf of the Accident Compensation Corporation (ACC).

Injury and disability insurance claims can amount to a substantial amount of money which may require validation before compensation is made.

An insurance investigator can help you to confirm the validity of insurance claims or to investigate a claimant who is suspected of misrepresenting the facts.

Our surveillance operatives and intelligence specialists are experienced with these types of investigations. 

Theft, fraud & dishonesty

Unexplained loss in your business? Do you suspect theft, fraud or other criminal offending? Investigating dishonesty, including staff theft is best left with the professionals. 

Fraud or theft inside a business or organisation frequently occurs through a lack of internal processes, which opens a window of opportunity for trusted staff to carry out acts of dishonesty.

We are experts at the detection and investigation of suspected theft, fraud and criminal behaviour. The evidence provided by our private investigators are often used for the basis of a complaint to police.

Wondering how to catch a thief in your business or workplace? We have a lengthy track record of catching offenders. We can provide indisputable evidence for a criminal prosecution or civil legal case.   

Surveillance operations

The Neill Group team includes a former government intelligence specialist who is highly-trained in surveillance. Our specialist has gained significant experience working in complex and sensitive environments.

Covert surveillance is a common element in criminal investigations, private investigations, insurance investigations and the investigation of infidelity (suspected cheating partners).

Surveillance can gain evidence required for a family court case, criminal prosecution or to record the activities of a spouse or partner. 

Our experience has proven that sustancial eveidence and intelligence can be discreetly gained from well-managed surveillance operations that have a clear goal. 

Sensitive personal  investigations

Is your ex-partner not adhering to child custody arrangements? Are you being stalked? Do you suspect your spouse or partner are being unfaithful?

We carry out private, personal and sensitive investigations regarding child custody issues and other domestic related matters  (e.g. a parent not adhering to a court order or carrying out harassment type activities).

Our private investigators are experienced at covert operations (working undercover). Using traditional and electronic strategies, they can detect harassment, unlawful acts, anti-social behaviour and deception within a business or personal relationship.  

IP & trade mark investigations

Our private investigators are instructed by legal firms to investigate infringement of branding, copyright and trade mark patents. They can also look into the unauthorised use of logos and theft of intellectual property.

The Neill Group's founder, Dion Neill has personally carried out investigations for global companies, including: Nike, Adidas, Armani, Microsoft, Playboy and Sony PlayStation.

Don't let others piggyback on your business success. Where ever you're based in New Zealand or the world, we can help you to protect the integrity of your brand and the good reputation of your company or organisation.