ABOUT

SIS was founded to provide discreet, reliable and results-driven private investigations in London and across the UK.

Founded by Gyula Szabados, with over a decade of professional investigative experience – including 8 years as a criminal investigator in Hungary and further work as a private investigator in London – we bring proven expertise and dedication to every case.

Our focus is on field investigations: surveillance, tracking and locating individuals. We specialise in infidelity cases, missing persons investigations and thorough background checks.

What sets SIS apart is our old-school, on-the-ground approach. We believe the best results come from patience, attention to detail and real-life observation – not just sitting behind a computer screen.

Every enquiry is handled with professionalism, integrity and the highest level of confidentiality. Our mission is simple: to uncover the truth and deliver peace of mind to our clients.