Australian Private Investigators 

AOSG is a not for profit Australian private investigation and security management company with offices in Brisbane and Maroochydore Queensland, Australia. We provide private investigation services throughout Queensland, New South Wales, ACT, Victoria, South Australia, Western Australia and the Northern Territory. AOSG private investigators operate across Australia and throughout the world. 

For more information about AOSG international investigations, please select our International Investigations menu option or click  International Investigations.
You can feel confident our experienced Australian private investigators with extensive backgrounds in law enforcement, surveillance, private as well as corporate investigations are there to help you. We are professional, discreet, competitively priced and proud of our exemplary client service. 

Our Services
Competitively Priced and Affordable

Australian Private Investigators

Services for individuals

Services for businesses

  • Australian Infidelity Surveillance

  • Australian Missing Persons

  • Australian Child Custody Investigations

  • Australian Process Serving

  • Australian TSCM (Bug Sweeping)

  • Australian Property Investor Due Diligence  

  • Australian Company Due Diligence

  • Australian Counter Espionage

  • Australian Work Injury Surveillance

  • Australian Process Serving

  • Australian Intellectual Property Investigations

  • Australian TSCM (Bug Sweeping)

Why hire a Private Investigator? 

A loose definition of a private investigator is a freelance private detective who works for private clients. Australian private investigators are not government law enforcement employees; however, they may from time to time work for government agencies in an outsourced capacity.


It is unlawful for an individual to conduct covert surveillance in Australia unless they hold a valid security licence authorising them to conduct private investigations. AOSG provides affordable private investigation and surveillance solutions that are targeted, intelligence driven and tailored to your needs. That is why people choose AOSG to help them with their private investigations in Australia. AOSG's Australian private investigation team are highly experienced licensed private investigators with the skills and capacity to conduct covert surveillance and private investigations professionally and discreetly with our client's best interests in mind.

Who we have helped 

For families and individuals, AOSG has helped:

  • Family members connect with missing loved ones

  • Spouses discover the truth about unfaithful partners

  • Mum's and dads find peace of mind during distressing family law and custody battles

  • Separated spouses serve divorce papers and other important documents

  • Rental owners concerned about the upkeep of their properties and;

  • Savvy property investors with their due diligence before purchasing investment properties 

For business and corporations, AOSG has helped:

  • Monitor suspicious work injury claims through covert surveillance 

  • Businesses concerned with staff stealing money and products from their stores

  • Companies with national and international interests to conduct due diligence for potential mergers and takeovers

  • Investigate intellectual property theft occurring internationally

  • International and national businesses with document service Australia wide

Why people choose AOSG

AOSG is a registered supplier for the Australian Federal Government and defence industry. Whether the job is large or small, it does not matter. Our clients have the confidence in us because we apply the same service standards to everyone regardless of whether they are individuals, corporations or government agencies. 

People choose AOSG because:

  • We offer affordable solutions to problems because our rates are highly competitive.

  • We are experienced, professional, ethical and discreet and genuinely care about our clients.

  • We provide no obligation free quotes for our services. When you contact us, we listen to your needs and tailor our services to work within your budget.

  • We maintain currency in all our licences and ensure anyone working for us is appropriately licensed.

  • We can provide solutions that suit your needs while hopefully reducing your expenses at the same time. We would like you to remember that your business is important to us and we are employed by YOU!


"I can’t speak highly enough of the work of the team at AOSG. Timely, professional and discrete. One of the best going around!"

T.S ~ Legal, Sunshine Coast

“As a self-represented litigant in a protracted legal proceeding, I engaged AOSG for surveillance and documentation to accurately refute specific inaccuracies by the other party. The team at AOSG were able to quickly grasp my requirements, provide me with a reasonable quote and update me as they proceeded. The subsequent report was concise, the investigator was available to the courts for cross examination and I appreciated their knowledge, speed, accuracy, and professionalism”

L.M ~ Sunshine Coast

"The team at AOSG were extremely helpful in assisting a client involved in a protracted and complicated family law matter. As a corporate investigation company with a focus on international investigations and the travel insurance sector, AOSG provide a client-focused approach to their service delivery. We found AOSG to be professional and that they take all of their matters very seriously. We are very appreciative of their recent support and there surveillance work assisted in practically giving evidence to the Judge that was able to be viewed in the court room."

J.S legal, Sunshine Coast

“Since Veriton Asia Ltd first partnered with AOSG three years ago, we have collaborated on world-wide insurance investigations as well as matrimonial and corporate surveillance in Australia. AOSG have always met, and often exceeded, our investigatory requirements. AOSG is professional in all aspects of its work including well-presented findings. With AOSG, we can assure top-quality, international investigations to our clients in Australia as well as SE Asia”

C.W, Director, Veriton Asia Hong Kong

"We have worked with Alternative Options Security Group (AOSG) over many years and have complete confidence in recommending them. We have always found AOSG to be highly trained, discreet and professional.  Requests are dealt with promptly and investigations carried out efficiently, and with complete satisfaction"

M.P MIPI, DPM Facts Ltd, United Kingdom