When You Need the Truth, We Find It.
Stirling Investigations is a licensed private investigator in NSW, based in the Sydney CBD. Families, businesses and law firms come to us when they need the facts. It might be a personal matter you can't talk about with anyone else, or a claim against your business that doesn't add up. Either way, Gavin Willis, our lead investigator, oversees every case and has 15 years of experience. Your enquiry stays confidential from the first call.
Results that speak for themselves.
Because in this industry, your reputation is built case by case.
When the stakes are high, in court, in custody, in business, you need evidence that holds up and a team you can trust completely. Four reasons why Australia's most discerning clients trust us with their most sensitive matters.
Start with a free consultationOur plain-clothes operatives and unmarked vehicles have a zero-detection track record. In high-profile relationships, sensitive business matters, and live custody disputes being detected doesn't just compromise the investigation, it can change everything.
Every piece of evidence we gather is professionally documented. For child custody and workers compensation investigations, our reports are formatted to meet family law and tribunal standards. Court-admissible, timestamped, and compiled with the rigour that legal proceedings demand.
Gavin Willis personally oversees every investigation. As a former defence force operative with 15 years of private investigation experience, Gavin brings both the skill and human understanding that sensitive cases require. You speak to an investigator, not a call centre.
Your investigation is never discussed outside our team. We use encrypted communications, sign NDAs when required, and maintain strict confidentiality long after your case concludes. Your name, your situation, your evidence, all protected completely.
AIPI Member
NSW Licensed
NSW Gov
From your first confidential call to a detailed, court-ready report, designed to protect you every step of the way.
Start with a free consultationThere is no script, no pressure, and no judgment. Just a private discussion about your situation, your concerns, and what you actually need. We will give you honest advice, even when investigation isn't the right next step for you.
No two cases are the same. We design a precise investigation strategy. The right techniques, the right timing, the right documentation to give your specific situation the best possible outcome. Costs and scope are agreed upfront. No surprises.
Our experienced agents conduct the investigation with complete discretion. You receive real time updates during surveillance, never left waiting and wondering. Everything is documented with precision from the moment the investigation begins.
We securely deliver and discuss your evidence documents. Timestamped video, photographs, a written operative report, and strategic advice on your next steps. For court-related matters, all documentation meets the required legal standard.
From personal surveillance to specialist counter-measures, thirteen services, three categories, one standard of investigative excellence.
Discreet observation with court-admissible evidence and daily updates throughout. From $880 inc GST ($800 + GST).
Learn MoreDiscreet evidence-gathering when suspicion becomes too much to carry alone. From $880 inc GST ($800 + GST).
Learn MoreCourt-admissible evidence for family law proceedings, prepared to evidentiary standards. From $880 inc GST ($800 + GST).
Learn MoreSkip tracing for missing debtors, relatives, and lost contacts. Address from $660 inc GST ($600 + GST). Phone from $275 inc GST ($250 + GST).
Learn MoreComprehensive digital footprint analysis. Multi-platform, manually verified, delivered in 5 business days. From $495 inc GST ($450 + GST).
Learn MoreTribunal-ready surveillance evidence for fraudulent claims. Fast deployment, decisive documentation, expert witness support. From $880 inc GST ($800 + GST).
Learn MoreLocate hidden assets, verify financial disclosures, investigate director malpractice. Built for insolvency practitioners and creditor lawyers. From $880 inc GST ($800 + GST).
Learn MorePre-employment, tenant, and partner verification. Independent, verified, delivered confidentially. From $220 inc GST ($200 + GST).
Learn MoreReliable, prompt service of legal documents nationwide. Sworn affidavits and locate capability for hard-to-find recipients.
Learn MoreTSCM countermeasure inspection for cars and trucks. GPS tracker detection, audio device sweeps. From $880 inc GST ($800 + GST).
Learn MorePrivacy inspections for homes and properties. Comprehensive room-by-room TSCM. From $1,100 inc GST ($1,000 + GST).
Learn MoreBoardroom and office TSCM sweeps. Protect competitive intelligence and confidential meetings. Tailored quotes.
Learn MoreForensic audio cleaning and amplification. Recover speech from noisy or distorted recordings. Assessment $109 inc GST ($99 + GST).
Learn MoreThree groups of people we work with most. If your situation looks like one of these, or even close to it, let's talk.
A relationship has changed. A parent has concerns. A loved one has lost contact. You need clarity before making a decision that will reshape your life, and you need it handled with absolute discretion.
Speak in confidenceA workers compensation claim doesn't add up. A former senior employee is acting in breach of restraint. A debtor has gone quiet. You need tribunal-ready evidence, and you need it before the cost compounds.
Get a quoteYour client needs surveillance, asset location, or process serving, to evidentiary standard, on a defensible timeline. We deliver court-admissible reports and work alongside your legal strategy.
Brief our teamReal cases, documented evidence, proven outcomes, without ever compromising client privacy. The truth changes lives.
All Case StudiesAfter eight months of suspicion and one failed confrontation, a Sydney professional finally had the certainty she needed, gathered discreetly in three surveillance deployments.
A Sydney mother had been dismissed as "the vindictive ex-wife" for 18 months. Until professional, court-admissible evidence told a different story in Family Court.
A New South Wales business owner was getting nowhere with his insurer. Four hours of surveillance footage told a different story and saved him $73,000 in fraudulent payouts.
A Sydney managing director suspected a competitor leak but had no proof. A professional TSCM sweep found two active surveillance devices and changed everything.
An estate executor needed missing beneficiaries found before a settlement deadline. Our investigators delivered confirmed current addresses within 72 hours.
Whatever you're facing, a personal matter that's been keeping you up at night, a concern for your children's safety, or a threat to the business you've worked to build, you don't have to carry the uncertainty alone.
Your first call to Stirling Investigations is completely confidential.
There is no obligation, and there is no judgment.
Verified Google reviews from real clients.
Stirling Investigations is a licensed private investigator in Sydney, based at Mezzanine Level, 388 George Street in the CBD. We hold NSW Master Licence 000108692 and take on cases across Greater Sydney and regional New South Wales for private clients, solicitors, insurers and businesses.
Most of our work happens where our clients live and work. We carry out surveillance, locates and background checks across the Sydney CBD, the Eastern Suburbs, the Inner West, the North Shore and Northern Beaches, Parramatta and Western Sydney, the Hills District, South West Sydney and the Sutherland Shire, and in regional NSW by arrangement.
We know Sydney's suburbs, roads and courts, and our investigators can be on the ground quickly. You might need covert surveillance, help finding someone, a cheating spouse investigation, process serving for a legal matter or a bug sweep of your home, office or car. Whatever it is, every enquiry is read personally and kept strictly confidential.
Answers to the questions we hear most. If you don't find what you're looking for, reach out directly. All enquiries are strictly confidential.
Ask us directlyPrivate investigation costs vary by service type, location, and case complexity. To give you a clear guide: our surveillance investigations start from $880 inc GST ($800 + GST) for a four-hour deployment, charged at $132 inc GST ($120 + GST) per hour thereafter. Social media investigations start from $495 inc GST ($450 + GST). TSCM bug sweeps start from $880 inc GST ($800 + GST) for vehicles and $1,100 inc GST ($1,000 + GST) for residential properties.
The most important thing to know: you will receive a clear, upfront quote before any work commences. There are no hidden fees, no surprise invoices, and no obligation to proceed after your free consultation.
Yes, when conducted by a licensed private investigator operating within Australian privacy legislation. Our investigators conduct surveillance only in public places or where otherwise permitted by law. All methods are lawful, and all evidence gathered is suitable for use in legal proceedings. Stirling Investigations holds an active licence in New South Wales.
It depends on the service. Evidence gathered for child custody investigations and workers compensation fraud matters is court-admissible and professionally formatted to meet family law and tribunal standards. Evidence gathered for infidelity investigations is for personal decision-making. Infidelity is not a legal ground for divorce in Australia, and infidelity evidence cannot be relied upon in family court property or financial proceedings.
We will always be transparent about admissibility before you proceed.
No. All investigations are conducted by plain-clothes operatives using unmarked vehicles and professional-grade equipment. We will never make contact with, alert, or notify the subject of your investigation.
If operational security is a particular concern, for example in an active custody dispute or a sensitive corporate matter, raise this in your initial consultation and we will tailor our approach accordingly.
Timeframes vary by service and situation. A surveillance deployment may resolve in a single four-hour session or require multiple days, depending on your subject's routine and your specific objective. Social media investigations are typically delivered within five business days. Address searches and phone number searches are usually returned within three to five business days.
We will provide a realistic timeframe estimate during your initial consultation, with no promises we can't keep.
If you're in Greater Sydney, yes. Our office is at Mezzanine Level, 388 George Street in the Sydney CBD. We work across the CBD, the Eastern Suburbs, the Inner West, the North Shore and Northern Beaches, Parramatta and Western Sydney, the Hills District, South West Sydney and the Sutherland Shire. Regional NSW is by arrangement. Call 1800 403 143 at any hour, and you'll speak to an investigator, not a call centre.
First, check the licence. A licensed NSW investigator can give you their licence number straight away. Ours is NSW Master Licence 000108692, and we're members of the AIPI. Second, ask who will actually run your case. At Stirling, Gavin Willis oversees every investigation. Third, get the cost in writing before anything starts. We give you a clear quote after your free consultation, and you're under no obligation to go ahead. Last, ask whether the evidence can be used in court for your type of matter. We'll tell you honestly before you decide.
The questions you're afraid to ask out loud, answered in plain language.
After 15 years and over 2,000 cases, Gavin Willis has seen every version of this story. This guide is the knowledge he wishes every client had, to gain the truth and find peace.
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