Long Island Investigators

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.

516-458-1999 Private Investigator Long Island

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suffolk county private investigators

Nassau County Private Investigator 516-458-1999

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

Private Investigator Long Island, Nassau County

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

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, and Nassau County and Suffolk County PD. Call 516-458-1999.

Main Menu:

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. is a Private Investigator agency 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 516-458-1999

When it comes to private investigators, it seems the choices are nearly endless. Seems anyone with a little experience or a law enforcement background, claims to be the best. So why chose Nassau County Private Investigators? For many reasons that some other agency's keep to themselves. Today, it's an easy and inexpensive task to open up a web site and begin to offer services. But what about the investigators themselves? Were they law enforcement who did NO investigations during their career? Did they sit in a patrol car or supervise some unit? That's not investigation experience. Who are their investigators? How do they operate? We can answer all of your questions and address all issues with a free consultation at Call 516-458-1999.

We offer personal service. When you hire Long Island Investigations, Private Investigators in Nassau County, your assigned investigator and the founder, Paul, is available to you day or night. 24/7 access. In addition, we report events as they are unfolding, not hours or even days later. You are always informed and updated on events and details of your case.

We offer one-on-one service to you. You always speak with a live person, not an automated menu or off-site service. We accept any investigations, large or small. We specialize in the areas of Nassau County and Suffolk County as well as New York City.

We educate, train and instruct other 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.

We will not give your case to another agency or investigator. We will not ever sub-contract our cases. Never..ever. You can be assured that only our own investigators conduct the investigation you hired US for. Every case is investigated by our staff of former NYPD Detectives.

We serve a vast array of clients, consisting of the general public, 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.

Private Investigator in Nassau County, Long Island Investigations, 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