New Zealand's Leading Investigation & Security Consultancy
The only nationwide private investigation and security consultancy in New Zealand. Trusted by government, corporate, and legal clients since 1983.
Our Services
Private investigation and security services across New Zealand since 1983.
Commercial Investigations
Corporate fraud, internal theft, dishonesty investigations, and complex commercial matters. Government and legal sector specialists.
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Surveillance & CCTV
Full-time dedicated surveillance specialists with the latest tracking capability and real-time updates. Covert and overt solutions.
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Security Reviews & Services
Independent security consultancy for commercial and government entities. Risk management, audits, CCTV systems, and physical security.
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HR & Employment Investigations
Workplace misconduct, policy breaches, bullying and harassment complaints. Independent, evidential investigations for employers.
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Process Serving
Boutique document service by experienced investigators. Specialising in difficult serves where investigative expertise makes the difference.
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Vetting & Background Checks
Priority Ministry of Justice criminal history checks. Pre-employment screening for government, commercial, and hospitality clients.
Learn moreWhy Paragon
Founded in 1983 by Ron McQuilter, Paragon is the only private investigation company in New Zealand with a formal board of governance, four decades of leadership, and current nationwide government contracts.
Our team includes former police detectives, military specialists, certified fraud examiners, and security consultants. We operate with independence, integrity, and discretion. These principles have earned us 85% repeat business.
PSPLA Licensed
Fully licensed under the Private Security Personnel Licensing Authority
Government Trusted
Preferred investigators for government agencies nationwide
Nationwide
The only truly national PI and security firm in New Zealand
40+ Years
The longest-serving PI firm in New Zealand
Our Mission
"To identify, anticipate and fulfil our client's needs with integrity, experience and commitment."
Trusted Results
What our clients say about working with Paragon.
"Thank you for all the outstanding work. You have played a very important part."
Chief Executive
State-Owned Enterprise
"I had a suspicion someone was stealing, but that much!!!"
CFO
Medium Manufacturing Company
"Quick and effective work. Our clients have been very pleased — we will recommend you."
Partner
Law Firm
In the Media
Featured across New Zealand's leading publications, national radio, and television.
October 2020
Spies, Lies and a Disappearance
37 years as a PI and how he solved the cold case of Lee Sheppard from a London police station.
October 2020 · Nine to Noon
Ron McQuilter on His Biggest Cases
National radio interview on NZ's most-listened morning show. The investigator's ABCs philosophy.
July 2025
Inside the World of Private Investigators
Ron quoted as industry leader: "PIs are held with a respect I don't believe anywhere in the world has."
June 2023
NZ Post's Contracted Investigation Firm
Paragon NZ named as NZ Post's investigation partner. 22 employees examined, 15 cases substantiated.
Nationwide Coverage
Offices and agents across New Zealand, from Northland to Southland.
Auckland
Head Office
Hamilton
Waikato
Tauranga
Bay of Plenty
Wellington
Capital Region
Christchurch
South Island
Ready to discuss your requirements?
Contact us for a confidential, no-obligation conversation. We'll listen first.