Long Island Investigator

Investigating for over 30 years!

Private Investigator Suffolk County

Long Island Investigations, Inc.


Consultations are free. We are there to answer all your questions in your time of need.

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For an overview of some of the services we offer

About Us - History


Visit our History page to learn more about our qualifications and experience

Suffolk County, Long Island Private Investigators


We conduct investigations throughout Nassau, Suffolk and New York City. We specialize in the Long Island area.

516-795-3368 FREE Consultation

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Long Island Private Investigator 516-795-3368

We are the premier Private Investigator based in Nassau County and Suffolk County, Long Island, NY. Our services are available throughout New York State and include Nassau County and Suffolk County. 

Long Island Investigations, Inc.

We have set the standard for private investigators on Long Island. See why we are the agency that so many PI's imitate and the many reasons why we are the leading Private Investigator on Long Island.

Experience Is Our Strength! Over 30 Years

24/7 full access to Senior Investigator and Founder of Long Island Investigations, Paul Massimillo. Our investigators are former NYPD Detectives. Call 516-795-3368.

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Our Services Include..

suffolk county private investigator



Cheating Spouse or Partner



Criminal Defense

Worker's Comp Fraud


Child Custody

Child Care Investigations

And much more...

Private Investigator

private investigator suffolk county

Long Island Investigations, Inc. Serving all of Nassau and Suffolk County

Affordable Investigations

We offer several forms of payment for our services including major credit cards.

What puts us in front of all the others? Call 516-795-3368

In the business of private investigators, the choices are endless. Today, when almost anyone with minimal experience or a law enforcement background, can enter the field by obtaining a license, setting up a web site and offer services, those in need must be diligent in choosing the right company. We believe that company is Long Island Investigations, Inc. When you hire us, your case will be handled by seasoned Detectives who are former NYPD investigators. Our Investigator's resumes include assignments to Organized Crime Control Bureau, Organized Crime Investigation Division, Joint Terrorist Task Force, Intel, Missing Persons and Special Victims, to name a few. We at Long Island Private Investigator posses extensive experience conducting complex investigations, surveillance and counter surveillance.

We can answer all of your questions and address all issues with a free consultation at Call 516-795-3368.

Our one-on-one personal service gives you access to your assigned Investigator, around the clock, as well as timely updates and progress reports on the details of your case. We guarantee your case will never be sub-contracted to an outside agency When you hire Long Island Investigations, you also have 24 hour access to Paul Massimillo, the lead Investigator and founder of the agency.

We accept any investigation, large or small. We specialize in the areas of Nassau County and Suffolk County on Long Island as well as New York City.

We educate, train and instruct other private investigators on our proven methods of investigations including surveillance and counter surveillance, through many seminars. We possess unmatched investigative experience and ability with literally thousands of hours conducting physical surveillance. Your initial consultation is always free! This includes all types of questions including infidelity or cheating spouse, matrimonial, divorce, child custody, worker's compensation and much more.

Our clients consist of the general public, law firms and attorneys, large and small corporations, nationally recognized insurance companies for insurance fraud investigations and more. Each client is treated equally, regardless of the size of the investigation.  We perform all investigations with  for you with diligence and when need be, confidentially.

Our cases include, but are not limited to infidelity, divorce, child custody issues, insurance fraud, and criminal defense.

Long Island Private Investigator is trusted and retained by the insurance industry's largest national firms to investigate fraud cases and worker's compensation fraud investigations. We are a private investigator agency, serving Long Island, Nassau County and Suffolk County.





Visit our About Us page to learn of our experience

Visit our Services page to see some of the services offered

Licensed Bonded Insured

Licensed by the New York State Department of State, Division of Licensing Services

Licensed 2005-2012 Long Island Investigations, Inc. All Rights Reserved