Aidan P. O’Connor


Aidan P. O’Connor


Practice Areas



Chambers USA 2020 Reports

Market commentators respect Aidan O'Connor for his "creative legal mind" and ability to "separate the important facts from the nonsense," noting that he is "an absolute pleasure to work with." He frequently defends individuals accused of fraud and corruption.


Aidan P. O’Connor is the co-chair of the Firm’s Criminal Defense Practice Group and a member of its Litigation Department, concentrating on criminal defense, internal investigations and complex civil litigation, including securities fraud matters. Aidan is a seasoned trial lawyer and has extensive experience in negotiating successful resolutions to difficult cases in both civil and criminal contexts. Aidan was an assistant United States attorney in the District of New Jersey for 18 years, serving in the Criminal Division, the Organized Crime Strike Force, and as the chief of the Violent Crimes Unit. He was a recipient of the Director’s Award for Superior Performance as an assistant U.S. attorney for his successful prosecution of a RICO case involving hundreds of millions of dollars in excise tax fraud and organized crime.

Since his return to private practice, Aidan has represented clients in state and federal courts, including an Orthodox rabbi accused of kidnapping husbands to force them to grant a divorce to their estranged wives, a New Jersey mayor accused of corruption, a police officer accused of fraud, a former CEO of a tech company in an SEC investigation, an entertainer and others charged with tax evasion, a large international labor union in a civil case involving hundreds of millions of dollars in assets and hundreds of thousands of workers, and a defendant in a federal securities fraud and tax evasion case containing allegations of approximately $200 million of loss. Aidan has handled civil cases involving civil RICO, the False Claims Act, securities fraud, regulatory issues, real estate, contract disputes, civil forfeiture and insurance issues. Criminal matters handled by Aidan include allegations of securities fraud, insurance fraud, health care fraud, tax evasion, bank and mortgage fraud, public corruption, union corruption, assault, kidnapping, extortion, murder, kickback schemes, computer intrusions and hacking, embezzlement, theft, sexual offenses, drug and controlled dangerous substance offenses, trade secrets, antitrust matters, federal grand jury investigations, and state parole violations in both state and federal courts, as well as municipal court matters. Aidan has also conducted internal investigations and defended against governmental investigations for companies and public entities. He has also managed subpoena compliance issues for numerous entities.

Aidan has tried over 20 federal jury trials, argued hundreds of motions and conducted scores of hearings involving organized crime, tax fraud, money laundering, government program fraud, racketeering, alien smuggling, homicide, bank robbery, narcotics trafficking, civil rights violations and other offenses. He has also argued appeals before the Second and Third Circuit Courts of Appeals. Aidan has conducted hundreds of federal prosecutions involving long- and short-term investigations, grand jury presentations, witness interviews, wiretapping, and search warrants for offenses including organized crime, RICO, tax fraud and evasion, money laundering, theft of trade secrets, union corruption, embezzlement, commercial and insurance fraud, large stolen property rings, health care fraud, computer crimes, extortion, murder, robbery, and kidnapping. Prior to joining the U.S. Attorney’s Office, he was a litigation associate from 1986 to 1990 with Thacher Proffitt & Wood in New York City, where he conducted or assisted in another half dozen civil trials involving banking and international maritime insurance in state and federal courts.

Mr. O’Connor has represented clients, conducted investigations and debriefed and presented at trial and other proceedings, witnesses in Spanish, Korean, Chinese (Fukinese, Mandarin and Cantonese), Hebrew, Thai, Turkish and Tigrinya.

Professional/Civic Activities

  • Member, New Jersey State Legislature’s Criminal Sentencing and Disposition Commission
  • Officer and Member of the Executive Committee of Rutgers Law School ‘s Inn of Court (the Willard Heckel Inn)
  • President- Association of Criminal Defense Lawyers of New Jersey (ACDL-NJ)

Bar/Court Admissions

  • New York
  • New Jersey
  • United States Courts of Appeals for the Second and Third Circuits
  • United States District Courts for the District of New Jersey and the Southern and Eastern Districts of New York


  • B.A., Columbia University, 1983
  • J.D., University of Virginia School of Law, 1986

Honors and Accolades

  • Best Lawyers, Criminal Defense: White-Collar, 2015-2018, 2021-2022
  • Chambers USA, Business Litigation, White-Collar Crime & Government Investigations, 2017-2020
  • Chambers USA, “Leaders in their Field”, 2013-2016
  • New Jersey Super Lawyers, 2013-2021

The Chambers USA ranking list is published by Chambers & Partners. A description of the selection methodology can be found at

The Super Lawyers list is issued by Thomson Reuters. A description of the selection methodology can be found at

The Best Lawyers list is issued by Woodward/White, Inc. A description of the selection methodology can be found at

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Practice Areas