NYS DOS License #11000169770 ◆ Licensed • Bonded • Insured
Call: (646) 461-4650 ◆ Text: (646) 465-2006
New York Intelligence Agency Est. 1989 · NYC
New York Intelligence Agency office at 555 Fifth Avenue, Manhattan
Emmy Award statuette. David Schassler, New York Emmy winner Emmy® Award Winning · Est. 1989

New York's Most Trusted Private Detective.

For over 40 years, David Schassler and New York Intelligence Agency have served the city's most discerning clients from our 555 Fifth Avenue office. Our clients include Wall Street firms, defense attorneys, public figures, and private people who need absolute discretion.

★ Emmy® Award NYS DOS License #11000169770 Licensed · Bonded · Insured
Call (646) 461-4650 → Text (646) 465-2006
40+
Years on the
case · NYC
As Featured In
NY POST CNBC EMMY® National Academy Legal Leaders
Fully Credentialed
Licensed · Bonded · Insured
Every Case
Strict Confidentiality
When It Counts
Rapid Case Response
Reach David
Available 24 / 7
What We Investigate

The full spectrum of private investigation, handled by one of the city's most experienced agencies.

From discreet matrimonial work to corporate counter surveillance, financial fraud forensics to international missing persons recoveries. Every case is personally vetted by David Schassler.

Matrimonial Investigations. New York City
No. 01

Matrimonial Investigations

Discreet investigation when you need to know the truth about a spouse or partner.

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Domestic Surveillance. New York City
No. 02

Domestic Surveillance

Surveillance involving family, children, marital concerns, or the home. Handled with the discretion that protects everyone involved.

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Corporate Surveillance. New York City
No. 03

Corporate Surveillance

Protect your company's assets from internal theft, fraud, and corporate espionage with discreet workplace and field surveillance.

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Missing Persons. New York City
No. 04

Missing Persons

When the police investigation ends, ours begins. Specialized missing persons investigations across New York and internationally.

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TSCM & Debugging. New York City
No. 05

TSCM & Debugging

Technical surveillance counter measures. Bug sweeps and electronic counter surveillance for executives, attorneys, and high value targets.

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Financial Fraud. New York City
No. 06

Financial Fraud

Forensic investigation of embezzlement, securities fraud, partner theft, and complex financial misconduct.

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Insurance Fraud. New York City
No. 07

Insurance Fraud

Surveillance and documentation of fraudulent claims for insurers, defense counsel, and self insured corporate clients.

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Criminal Background Checks. New York City
No. 08

Criminal Background Checks

Pre employment, pre marital, and pre business background investigations by licensed investigators. Far beyond what online services give.

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Who We Help

Built around the people who call us.

Corporations protecting their interests, attorneys building their cases, and families who need the truth. Every client gets David's direct attention.

Corporate investigations for New York businesses and executives

Corporations & Executives

Internal fraud, counter surveillance, and due diligence, handled with boardroom discretion.

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Investigative support for New York attorneys and law firms

Attorneys & Law Firms

Court ready surveillance, witness location, and expert testimony built to hold up at trial.

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Discreet private investigations for individuals and families in New York

Individuals & Families

Infidelity, missing loved ones, and background checks, handled quietly and with care.

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Confidentiality

Discretion is not a feature of our work. It is the work.

If a subject ever realizes they are being watched, the case is over. Protecting your privacy is built into every step, from the first call to the final report.

Your identity stays private. Our fieldwork stays invisible. Your case materials are shared only with the people you authorize.

How We Protect Your Privacy
A banker's lamp and a navy leather case folio on a desk at New York Intelligence Agency
40+
Years Investigating
1×
Emmy Award Winner
5,000+
Cases Closed
24/7
Available Worldwide
David Schassler reviewing case files and a surveillance map at the New York Intelligence Agency office
How We Work

Every case is planned before a single hour is logged.

No two investigations are the same. David maps each one himself, then builds the team, the timing, and the methods around what the case actually needs.

It starts with a free, confidential call. You get an honest read on what is realistic and a clear estimate before you spend a dollar. From there we plan the surveillance, the documentation, and the evidence so it holds up if your case ever reaches a courtroom.

About New York Intelligence Agency

An Emmy Award winning investigator at the head of one of New York's most respected agencies.

Nationally respected private investigator David Schassler founded New York Intelligence Agency in 1989. Over 40 years he has built a reputation among Wall Street firms, top tier defense attorneys, and high net worth families for one thing above all: getting answers when others can't.

David's specialties span TSCM debugging, domestic and corporate surveillance, infidelity investigations, financial fraud forensics, and missing persons recovery. His Emmy Award for investigative work. Rare among private investigators. Speaks to the caliber of cases he handles.

Every case is personally reviewed. Every client gets David's direct line.

About David Schassler Why Hire a Licensed PI
David Schassler, Emmy Award winning private investigator and founder of New York Intelligence Agency
"We don't take cases we can't close." David Schassler, Founder
Coverage

Five boroughs. Forty Westchester villages. Rockland County. All of Long Island.

We work where our clients need us, and have field investigators across the entire New York metro area. Beyond the region, we operate nationally and internationally through vetted partner agencies.

Manhattan skyline
Manhattan
New York City
From Wall Street boardrooms to Upper East Side townhouses, our Manhattan investigations cover the city's most demanding clients.
Brooklyn brownstones
Brooklyn
New York City
Brooklyn's diverse neighborhoods. From brownstone Park Slope to industrial Sunset Park. Demand investigators who know the borough's geography and rhythm.
Queens, New York
Queens
New York City
Queens spans the most ethnically diverse zip codes in America. Our investigators speak the languages and know the neighborhoods, from Astoria to Jamaica.
The Bronx and the George Washington Bridge
The Bronx
New York City
The Bronx is where deep local knowledge matters most. We work from Riverdale to Mott Haven, with the discretion every Bronx case demands.
Staten Island, New York
Staten Island
New York City
Staten Island feels worlds away from Manhattan, and our investigators know its tight knit neighborhoods, from St. George to Tottenville.
Wall Street and Lower Manhattan
Wall Street
New York City
Financial District investigations require investigators who understand securities, partnerships, and the speed of capital. We operate inside the most demanding sector in New York.
Westchester County aerial view
Westchester County
40 Villages & Towns
Comprehensive coverage from Yonkers to Pound Ridge. Scarsdale, White Plains, Bronxville, and every village in between.
Long Island harbor
Long Island
Nassau & Suffolk
Hempstead, Garden City, Great Neck, Huntington, Long Beach, Freeport. Discreet investigations across Long Island.
Rockland County, New York
Rockland County
Haverstraw Office
Our second office sits in Haverstraw, covering New City, Nyack, Suffern, Spring Valley, and every Rockland community in between.

New York Intelligence Agency takes cases across 566 neighborhoods and ZIP code areas spanning all five boroughs, Westchester and Rockland counties, and Nassau and Suffolk on Long Island. Every marker below is an area we cover.

566 neighborhood & ZIP areas we serve Borough & county hubs Headquarters · 555 Fifth Avenue

From Our Clients

40 years of cases. Five star word of mouth.

★★★★★

Helped me find closure in a case that had haunted me for years. David's discretion and skill were exactly what I needed. I cannot recommend New York Intelligence Agency highly enough.

Verified Google Review
★★★★★

I came to David in a desperate situation involving my business partner. Within weeks he had the documentation we needed for litigation. Professional from start to finish.

Corporate Client
★★★★★

The TSCM sweep David's team performed on my office uncovered exactly what I had suspected. They handled it quietly and have my full trust going forward.

Verified Client
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From the Field

Investigation insights from one of New York's longest running agencies.

What we've learned over 40 years of casework. Practical guidance on surveillance, counter surveillance, fraud detection, and what to expect when hiring a private investigator.

TSCM bug sweep and electronic surveillance detection by New York Intelligence AgencyTSCM
PRIVACY · 8 MIN READ

How to Detect Hidden Cameras and Listening Devices

A practical guide to identifying covert surveillance in your home or office before professional countermeasures.

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Corporate surveillance and employee investigations in New York CityInvestigation
LEGAL · 10 MIN READ

How Private Investigators Legally Collect Evidence in New York

What investigators can and cannot do under New York law, and why the answer matters for your case.

Read Article →
Private detective for cheating and matrimonial investigations in New York CityInvestigation
HIRING · 9 MIN READ

Top Reasons to Hire a Private Investigator in NYC

The situations that genuinely need a licensed New York PI, and the ones where one isn't worth the cost.

Read Article →
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Frequently Asked Questions

What clients ask before hiring us.

What kinds of cases does New York Intelligence Agency handle?

We handle the full range of private investigation work. Matrimonial and infidelity investigations, corporate surveillance, financial fraud, missing persons, TSCM bug sweeps, background checks, and complex multi jurisdictional cases. With over 40 years of experience and an Emmy Award for investigative work, David Schassler personally vets every case we take.

How much does a private investigator in New York cost?

Costs vary by case complexity. Most matrimonial surveillance work is billed hourly with retainer. Corporate engagements are typically project based. First consultations are free and confidential. Call David directly at (646) 461-4650 to discuss your situation and get a clear estimate before any commitment.

Are you licensed to operate outside of New York?

Yes. We operate throughout New York State as a fully licensed agency (NYS DOS License #11000169770), and we conduct investigations nationally and internationally through vetted partner agencies in every major U.S. city and most countries. Overseas investigations are one of our specialties.

Can you help catch a cheating spouse in New York?

Matrimonial investigations are one of our core practice areas. We give discreet, legally admissible documentation suitable for matrimonial proceedings in New York Supreme Court. Every case is handled by experienced investigators who understand how to work without alerting the subject.

Can you find a missing person in New York City?

Yes. Missing persons work accounts for a significant portion of our caseload. We have the technology, contacts, and investigative experience to locate people across the U.S. and internationally. Many of our missing persons cases come to us after police investigations have stalled.

Is everything confidential?

Absolutely. Client confidentiality is the foundation of our practice. Every consultation, investigation, and communication is treated with the discretion our clients expect from a 40 year New York agency. We do not share client details under any circumstances except as needed by court order.

A leather case folio, brass magnifying glass, and fountain pen on a desk at New York Intelligence Agency
The Standard

Old school discretion. Evidence built to hold.

Thirty five years of casework comes down to a simple standard. We work quietly, we document everything, and we only take cases we believe we can close. It is why Wall Street firms, defense attorneys, and private families call David first.

Free, Confidential Consultation

When you need answers,
call David directly.

(646) 461-4650
Call Now → Text (646) 465-2006
Licensed & Accountable

Verify our license

Anyone can call themselves an investigator. A licensed agency is on the record with the State and answerable to it. You can confirm our standing yourself through the New York Department of State public license database. Search by our agency name or by our license number.

NYS DOS License #11000169770

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