Group One Investigations
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Group One Investigations
Group One Investigations is a well-established private investigator agency with more than 20 years of intelligence and surveillance experience. We believe that you deserve to know the truth of a situation and that the best decisions are made when a person possesses the full range of information available to them. We aren't just in the intelligence game, we're in the truth game.

To that end, we have a robust selection of specialised services available to our clients, including basic activity reports, exposing spousal infidelity, conducting background checks for both corporate and private clients, due diligence, finding missing persons, covert surveillance operations, corporate issues, identifying security weaknesses, performing bug sweeps, identity theft, the sale of security equipment, and more specialist services.
Services
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Contact Group One Investigations on 1800 181 880 or info@grouponeinvestigations.com.au for a free consultation with Melbourne's most reliable private investigation agency. Information is power, and the most elegant solution to making a decision under uncertain circumstances, is to remove uncertainty from the scenario with the help of an accomplished investigator.
Melbourne
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Group One Investigations are Melbourne's premier private investigation agency, specialising in both corporate and private surveillance. Sometimes things are not what they seem. People can conceal the truth from you, not necessarily out of malice, but because it benefits them. When you just need to get to the bottom of a situation, a private investigator can uncover information that no-one else can.
Private Investigation Services
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We provide bespoke solutions to both corporate and private clients in Australia and abroad. We are licensed by the Australian Government and all of our operations, no matter how large or small, from information gathering to clandestine surveillance, are conducted using only legal means, and are handled firmly under strict confidentiality agreements.
Corporate and Private Surveillance
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Please contact us 24-hours-a-day, 7-days-a-week on 1800 181 880 or info@grouponeinvestigations.com.au for a free consultation, and we can begin the process of providing you with the information you desire. In an ideal world we could take what people say at face value. Unfortunately, in our image-conscious world, interactions with others are rife with facades and guises.
Locate a Person or Debtor
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Do you need to find a missing person? Group One Investigations are experts in locating missing individuals, friends, family, and debtors.

With the refined application of our craft and use of the most up-to-date technologies in private investigation, we meticulously examine the details and identify the bread crumbs that will lead us to the individual Please read ahead for a detailed insight into how to get the process of locating a missing person started, and the strategies employed in finding a missing person.
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