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Barry Donadio​  

 Official Website 2023

A World Class Private De​tective 

A Private Detective these days needs to be trustworthy and competent in order to serve all your wants and needs as your Investigator, Bodyguard, and Security Consultant,

Private Detectives for all your needs

Barry Donadio's Detective Agency remains OPEN during the SARS-CoV-2, COVID-19 Novel Coronavirus Pandemic

We are currently offering private security guard forces and other security services for critical national infrastructure and our clients with private security needs during the national emergency.

Updated  : March 2023

Barry Donadio and his staff of Private Detectives are standing by ready to protect you, your family, your business and your assets

Donadio's firm Public Security LLC is licensed to conduct investigations in Maryland and New York. See the below information regarding the authority of our licensing in Maryland and New York


In Maryland, we have the authority to conduct investigations that concern:

1. a crime or wrong committed, assumed to have been committed, or threatened to be committed;

2. the identity, habits, conduct, movement, location, affiliations, associations, transactions, reputation, or character of any person;

3. the credibility of a witness or of any other individual;

4. the location of a missing individual;

5. the location or recovery of lost or stolen property;

6. the origin or cause of or responsibility for:

a. a fire;

b. an accident;

c. any damage to or loss of property; or

d. an injury to an individual;

7. the affiliation, connection, or relation of any person with an organization or

8. the activities, conduct, efficiency, loyalty, or honesty of any employee, agent, contractor, or subcontractor;

9. securing evidence for use before any investigating committee, or board of arbitration or for use in the trial of any civil or criminal cause;

10. non uniformed personal protection; or

11. conducting an investigation to locate or apprehend a fugitive from justice, unless the person:

a. conducting the investigation is a property bail bondsman or licensed by the Insurance Commissioner of the State or a similar licensing body of another state as a bail bondsman;

b. is an employee of a property bail bondsman or a licensed bail bondsman for the purpose of locating or apprehending fugitives from justice; or

c. is authorized as an agent by a property bail bondsman or licensed bail bondsman in advance of the apprehension of a fugitive from  justice.     


We conduct the following investigative services listed below in New York:

Investigations for the purpose of obtaining information with reference to any of the following matters,

Crime or wrongs or threatened against the government of the United States of America or any state or territory of the United States of America.

The identity, habits, conduct, movements, whereabouts, affiliations, associations, transactions, reputation or character of any person, group of persons, association, organization, society, other groups of persons, firm or corporation.

The credibility of witnesses or other persons.

The whereabouts of missing persons.

The location or recovery of lost or stolen property.

The causes and origin of, or responsibility for fires, or libels, or losses, or accidents, or damage or injuries to real or personal property.

The affiliation, connection or relation of any person, firm or corporation with any union, organization, society or association, or with any official, member or representative thereof; with reference to any person or persons seeking employment in the place of any person or persons who have quit work by reason of any strike.

Or with reference to the conduct, honesty, efficiency, loyalty or activities of employees, agents, contractors, and sub-contractors.

Securing of evidence to be used before any authorized investigating committee, of arbitration, or in the trial of civil or criminal cases.

We have the authority to provide the following Security Services in New York:

Protect persons or property or to prevent the theft or the unlawful taking of goods, wares and merchandise, or to prevent the misappropriation or concealment of goods, wares or merchandise, money, bonds, stocks, in action, notes or other valuable documents, papers, and articles of value, or to procure the return thereof or the performing of the service of such guard or other person for any of said purposes.

Protection of individuals and/or property from harm, theft or other unlawful activity.

Deterrence, observation, detection and/or reporting of incidents in order to prevent any unlawful or unauthorized activity including but not limited to unlawful or unauthorized intrusion or entry, larceny, vandalism, abuse, arson or trespass

Street patrol service.

Response to security system alarm installed and/or used to prevent or detect unauthorized intrusion, robbery, burglary, theft, pilferage other losses and/or to maintain premises.


Barry Donadio, Former U.S. Secret Service

President of Public Security LLC



Birth Place

Bay Shore, New York

Current place of residence

Kent Island, Maryland

Positions held:

President / Founder 

Public Security LLC

June 2013 - Present

Maryland | Washington D.C. | New York

Special Agent

United States Government

Jan 2010 - June 2013

Virginia | Washington DC | Middle Eastern War Zones

Emergency Response Team (ERT) Police Officer-Technician

United States Secret Service

Mar 2002 - Jan 2010

The White House | Bush Ranch | Multiple Deployments

Team Leader Emergency Services Team / Investigator

US Air Force Security Police | New York Air National Guard

Feb 1994 - Mar 2002

Persian Gulf | South America | South Carolina | New York

New York City Special Patrolman | Peace Officer

May 1992 - Jan 1994

Lefrak Housing | Corona, Queens, New York

Military Police Officer 95B June 1990 - Feb 1994

Infantry Scout 11B Dec 1987 -June 1990

U.S Army Reserve / New York Army National Guard

Queens, New York / Hempstead & Patchogue, New York


Sept 1989 - May 1992

Islip Township | Suffolk County, New York


  Maryland Private Detective Agency License # 106-4352

     New York State Private Investigation Agency License #11000165760