Business Details
Your Trusted Partner for Investigative and Security Solutions
Guardian Security & Investigations has built a reputation as a leader in professional investigative and security services across Australia and internationally. Founded on over three decades of hands-on experience by Managing Director David Mandrake, our team combines deep expertise in risk assessment, surveillance, and legal investigations with a commitment to ethical practices. We specialise in tailored solutions for individuals, businesses, and legal professionals, offering services such as missing persons investigations, technical surveillance countermeasures, and corporate fraud detection. Our global network ensures seamless cross-border collaboration, while our local knowledge provides nuanced insights into Australian markets.Accredited by the American Red Cross and holding multiple industry licenses, we prioritise transparency, legal compliance, and client confidentiality. With a track record of delivering actionable results, we empower clients to resolve complex challenges with confidence. Our dedication to continuous professional development ensures our team remains at the forefront of investigative techniques and security innovations. By focusing on client-centric outcomes, we have earned trust as a reliable partner in safeguarding assets and uncovering critical information.
Services
Surveillance
Missing Persons
Process Service
Security Risk Assessments
Technical Surveillance Countermeasures
Employee Theft Investigations
Insurance Fraud
Sexual Harassment Claims
Asset Protection
Privacy Consulting
Highlights and features
- We have over three decades of investigative experience across Australia and the USA.
- Our team consists of licensed experts with specialized skills in surveillance and legal investigations.
- We offer global investigative services through strategic international alliances.
- We provide tailored solutions to meet specific client needs and budgets.
- We adhere to strict ethical and legal standards with proven success in complex cases.
Associations and certifications
- American Red Cross
What people say
Came through on every case
Only firm we trust
Investigators were brilliant
Excellent success rate
Prompt responses
Services
Surveillance
Our licensed investigators design tailored surveillance strategies to gather discreet, legally admissible evidence. Using advanced technology, we track subjects' activities and document findings through photographic or video evidence. Clients receive detailed reports to support legal proceedings or internal investigations.
Missing Persons
Specialist teams employ cutting-edge techniques and global networks to locate missing persons. We work closely with families and legal representatives to reunite loved ones or provide closure. Our success stems from access to exclusive databases and international collaboration.
Technical Surveillance Countermeasures
We conduct thorough inspections to detect hidden listening devices, GPS trackers, and surveillance equipment in homes or workplaces. Using specialist tools like radiofrequency detectors, we ensure client privacy and security against electronic eavesdropping threats.
Corporate Fraud Investigations
Our experts investigate employee theft, insurance fraud, and financial misconduct using forensic techniques. We trace hidden assets, analyse financial records, and provide court-ready evidence. Services include witness interviews and expert testimony for legal proceedings.
Asset Protection
We develop strategies to protect assets from litigation risks through legal structures like trusts and offshore entities. Our consultants provide tailored advice on privacy solutions and compliance with Australian financial regulations.
People
David Mandrake
Managing Director
With over 30 years in investigations, David holds a Bachelor of Science in Criminal Justice and multiple international certifications. He leads global operations, specialising in risk assessments and legal advocacy, while maintaining active roles with the International Bar Association and Australian Security Industry Association.
Questions
What types of cases do you handle?
We investigate missing persons, corporate fraud, insurance claims, employee misconduct, and provide technical surveillance countermeasures. Our services also include asset protection and legal support for civil and criminal cases.
Are your investigators licensed?
All our investigators hold current NSW and QLD private investigator licenses, along with certifications in interrogation techniques and international humanitarian law training.
Can you operate internationally?
Yes, we collaborate with pre-approved international investigators across New Zealand, the USA, and other jurisdictions through strategic alliances for cross-border cases.
How do you ensure legal compliance?
We strictly adhere to Australian privacy laws and international investigative standards, ensuring all evidence collection methods are court-admissible and ethically conducted.
What payment options are available?
We provide detailed cost estimates upfront. Payment terms are discussed during initial consultations, with flexible arrangements available for complex long-term investigations.
