About Michael M. Rosensaft

Michael Rosensaft helps individual clients at what is often the greatest crisis of their lives — facing government prosecutors — and advises corporate clients through difficult and complex enforcement investigations. Whether it is responding to a regulatory subpoena, overseeing an internal investigation of employee wrongdoing or advocating for individuals in front of a jury, Michael devotes his efforts to ensuring his clients are protected. A litigator with years of courtroom experience, Michael defends individuals and companies through every stage of investigations and enforcement actions. And as a former AUSA, Michael understands government investigations and prosecutions from the inside and uses that knowledge to gain advantages for his clients.

An insider's approach to white-collar defense

As an Assistant United States Attorney with the Southern District of New York, Michael prosecuted criminal cases, working closely with federal regulators and law enforcement as well as government officials and foreign law enforcement around the world. Now, Michael brings his insider's perspective to his clients' defense, helping them navigate their most serious legal concerns.

Michael regularly represents individuals, small businesses, banks and hedge funds in handling regulatory request and actions, internal investigations and criminal indictments. Michael puts his efforts into assuring his clients are never charged with wrongdoing, but when his client's cases go to trial, Michael has the courtroom experience to mount a vigorous defense. He handles all aspects of litigation from efforts to resolve any issues prelitigation, discovery and motion practice, trial and, if necessary, appeal.

In recent years, Michael has vacated a 75-count conviction for a client on appeal in the Second Circuit and staved off attacks on his client's privileged communications with his former lawyer in the Third Circuit. Michael manages cases involving white-collar insider trading and fraud, health care fraud, anti-kickback cases, regulatory compliance issues, fraudulent tax shelters, money laundering and insurance fraud. He has conducted internal investigations for clients in multiple industries including health care, investment banking, food services and accounting.

As an AUSA for the Southern District of New York, Michael oversaw the investigation and prosecution of numerous criminal cases involving terrorism, international money laundering, export violations, bribery of foreign officials, RICO violations, bank fraud, wire fraud, health care fraud and computer crimes. He was responsible for all aspects of litigation as a federal prosecutor — from pre-indictment investigation and grand jury practice through discovery, motion practice, trial and appeal.

Throughout his tenure as an AUSA, Michael worked closely with federal investigative and administrative agencies, including the FBI, the IRS and the State Department. He also coordinated federal prosecutions with law enforcement and government officials in other countries, including working with UN and Guatemalan prosecutors in the investigation and indictment of the former president of Guatemala, Alfonso Portillo, for money laundering.

Michael served as law clerk to the Honorable Jane R. Roth of the US Court of Appeals for the Third Circuit.

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Practice Focus

  • White-collar defense and investigations
  • Regulatory investigations and enforcement actions
  • Corporate internal investigations
  • Insurance and health care fraud litigation
  • Complex civil litigation and business disputes
  • RICO investigations and litigation
  • Appellate advocacy

Representative Experience

  • Represent individual accused of market manipulation involving spoofing and coordinated trading.
  • Represent hedge fund manager in connection with insider trading investigation by US Attorney's office and SEC.
  • Internal investigation of major accounting firm amidst financial irregularities.
  • Represented individual before the grand jury and US Court of Appeals for the Third Circuit in a RICO conspiracy charge involving payday lending. The appeal produced a precedential opinion, protecting attorney-client communications from crime-fraud allegations.
  • Multiple representations of companies and individuals in connection with criminal, regulatory and rulemaking actions concerning bitcoin and other virtual currencies.
  • Money laundering investigation of potential foreign purchaser of communications company.
  • Successful representation of individual foreign exchange trader and his company in connection with SEC investigation resulting in no-action letter.
  • Represent owner of pharmaceutical company in criminal FDA matter.
  • Represent loan company in first-ever action brought by state regulator under Dodd Frank's UDAAP provision.
  • Internal investigation of medical manufacturer and supplier concerning the development and testing of medical device.
  • Advise regarding voluntary domestic and foreign tax disclosures by an individual and his investment company.

Presentations and Events