Serving New York City and Surrounding Areas. Licensed, Bonded & Insured.


New York Investigations

Voted best private investigator nyc, david schassler is the owner of one of the most prominent private investigation companies in the united states.

He’s been in the business for over 15 years and his experience and expertise with discrete investigations is unparalleled. With a primary specialty of matrimonial investigations, he’s got the right experience to get this job done. David Schassler is said to be not only top notch, but his company, New York Intelligence Agency, is the finest investigation agency nationwide.

Experienced Local & Federal Law Enforcement

We get the job done!

Confidentially – Professionally – Quickly.

Private investigator services in NYC

Corporate Surveillance

At New York Intelligence Agency, we provide corporate surveillance investigations NYC to protect your assets from current and future theft or threats.

Matrimonial Investigation

At New York Intelligence Agency, our NYC private investigators can help you find out if your spouse is cheating with discreet matrimonial investigations in NYC.

Domestic Surveillance

Our services at New York City Investigators Include Covert Surveillance and Electronic Countermeasures.

Armed Security

The best-armed security company in New York is New York Intelligence Agency. Our website has an informative section on the various services that are available for those who want to find the right security company for them.

Polygraph Testing & LIe Detection

Trusting people is not always possible if the person is untrustworthy. Sometimes you need help to find the truth and help to get peace of mind. Lie detection helps you know the truth behind a person’s actions in a scientific way.


What To Do About Your Missing Persons? What do you do if someone you care about suddenly goes missing? First, you should file a missing person report with the local authorities if you are concerned for their safety.


We offer full-service private security teams for your events, building management, and all kinds of corporate clients in the United States. Based in New York, we also have teams all over the country.

TCSM & Debugging Services

TSCM is short for (technical surveillance and counter-measures). Our TSCM Services include sweeps surveys and inspections. Get rid of unwanted electronic surveillance.

Overseas Investigations

Finding a private detective in New York City, who is able to help you out with an overseas investigation, isn’t as easy as you may think. It is therefore vital that you consider every aspect associated with hiring a New York private investigator and be sure you choose the right investigator for the job.


When you are the victim of financial fraud you will want to know the instigator of the incident. Whether it is recovery or simply justice that you want to achieve, you will have the best recovery team at your disposal


Identity theft can be a significant source of anxiety for anyone affected by it. Identity theft happens when criminals purchase or steal personal information to use for credit, jobs, or business ventures.

Criminal Background CHeck

For many businesses, pre-employment screenings and background checks have become an essential part of the hiring process. Background checks give companies the information they need to make smart hiring decisions.

Offering the most up-to-date Surveillance techniques

Matrimonial Investigations & Voice Stress Analysis – Truth or Lie Detection along with Executive Protection.

What Our Clients are saying