Investigation coverage across Nassau County and Suffolk County. From Great Neck and Garden City to Huntington and the East End.
From Nassau County's wealthy North Shore to Suffolk County's East End, NYIA has worked Long Island cases for over three decades.
Long Island generates investigation work that's distinct from the city. Matrimonial cases on the North Shore involve substantial estate properties and family money. Suffolk County's working waterfronts produce a different kind of caseload. Boating community surveillance, marine business investigations, and the insurance and disability work that follows from physical industries.
Our Long Island work is dispatched from our Manhattan office and supported by Nassau- and Suffolk based field investigators. Civil and matrimonial work runs primarily through Nassau County Supreme Court in Mineola and Suffolk County Supreme Court in Riverhead.






Yes. New York Intelligence Agency is a licensed, bonded, and insured agency (NYS DOS #11000169770) serving Long Island and the surrounding area. Every case is led by Emmy® Award winning investigator David Schassler with complete discretion.
From our Midtown Manhattan office we cover Long Island and the surrounding area; for urgent matters we can usually mobilize the same day.
It depends on the service. Surveillance is billed hourly, while background checks and polygraph exams are flat fees. Most cases are quoted after a free, confidential consultation, with a written estimate before any work begins.
A licensed private investigator working in Long Island, on call when you need us. Live weather data via Open-Meteo.