Private Investigators Serving Nassau County
Professional investigative services for attorneys, insurers, businesses and individuals throughout Nassau County, New York.
Investigative Support Across Nassau County
GSI assists clients with fact-finding, documentation and investigative research tailored to the assignment. Our work can support legal matters, insurance claims, business decisions and private investigative needs.
Surveillance
Professional field surveillance for appropriate civil, insurance and investigative matters.
Explore Surveillance →Insurance Investigations
Investigative support for claims, suspected fraud and field assignments.
Explore Insurance Investigations →Litigation Support
Locates, research and investigative assistance for attorneys and legal teams.
Explore Litigation Support →Background Checks
Background research for individuals, employers, property managers and businesses.
Explore Background Checks →Need Investigative Help in Nassau County?
Tell us what you need and where the assignment is located. We will review the scope confidentially.
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