Browse the Top 2 Private Investigators Servicing North Sydney, NSW

Guardian Security & Investigations provides professional investigative and security services across Australia and globally. Specialising in surveillance, missing persons cases, corporate fraud investigations, and asset protection, the company combines decades of expertise with cutting-edge technology. Led by licensed investigator David Mandrake, the firm delivers tailored solutions for individuals, businesses, and legal professionals.

Agency99 Investigations is a leading private investigation firm with over 20 years of expertise in locating individuals and resolving complex cases. We provide discreet, ethical, and technologically advanced services including surveillance, undercover operations, and background checks. Our team operates nationwide, offering tailored solutions for personal, corporate, and legal clients.