The Rominger Legal Private Investigator Directory is a resource for lawyers and the public to find professional Private Investigators In Sydney and detectives to assist them with investigating, information gathering, intelligence, and due diligence. Private Investigators In Sydney IN THE NEWS. YOUR SOURCE FOR Private Investigators In Sydney NATIONWIDE. The Rominger Legal Private Investigator Directory will help you find the professional investigative services you need. Click on a state to find a listing of regional and statewide investigators for that particular state. Then review the list of providers, click on the one(s) that meet your needs to review their contact information and biograhpies. Then click on their e-mail or web link to contact the provider on-line, or call the listed phone number..