A private detective role can differ as there are many job specific names within this job. Private detective can specialize in rather computer forensics and cyber crime investigation services or corporate and industrial services or person investigation services and perhaps even specialist services.
Cyber based offense is to do with internet investigation, technical Litigation Support, digital and computer forensics and business services. Individual identification providers are for matrimonial or domestic problems including tracing surveillance and enquiries. And specialist services are for close protection, like your personal safety guard.
Why you may need a private investigator in Sydney. For example, if you believe your spouse or fiancé or your long-term boyfriend is cheating on you then you are able to pay a private detective to investigate, monitor and evaluate your other half. This would mean that the detective would constantly follow the perp, make notes on their customs, record any discussions they can created by the perp and take photographs to show where they've been and exactly what time they had been there.
To Discover a great private investigator you need someone with many years experience and maybe even a history of the army, police so that you know that they are proficient at their job since it is practically what they have done their entire life!
Overall, a detective can help you fix any case that needs surveillance.