“He is known for his strong, strategic thinking and presence. A fantastic advocate who has the ability to put the client at ease and is always on top of every detail.” (2022)

“An excellent white-collar lawyer who is great at strategy.” (2021)

Chambers USA


Dan Stein is a partner in Mayer Brown's New York office, and a co-leader of the White Collar Defense & Compliance group. A former federal prosecutor, Dan has extensive experience in regulatory enforcement, government and internal investigations, white collar criminal defense and complex civil litigation. He counsels financial services firms and other corporate clients, as well as individual clients, in a range of complex issues, including US Securities Exchange Commission and Financial Industry Regulatory Authority investigations and enforcement actions.

Dan is recognized by Chambers USA 2021 as “a really talented and dynamic thinker who is very skilled in a number of areas. He is also recommended by Legal 500 US, where clients have commented: “Dan Stein is the reason we use the firm. His professional experience and him personally are the attractions” (2020).

Dan previously served for a decade in the US Attorney’s Office in New York, with two terms of duty. Most recently, he was Chief of the Criminal Division for the United States Attorney's Office for the Southern District of New York (SDNY), where he oversaw all of the SDNY's criminal prosecutions and investigations, including those involving securities fraud, insider trading, public corruption, foreign corrupt practices, criminal tax offenses, money laundering, economic sanctions, cybercrime, narcotics trafficking, violent crimes and terrorism. He assumed that position in July 2015, after serving as Chief Counsel to the US Attorney since July 2014. Earlier in his career, Dan was an assistant US attorney in the US Attorney’s Office in New York, where he investigated and prosecuted cases involving a wide range of federal crimes, including those involving companies in the financial services industry. In this role, he represented the United States in several significant criminal public corruption cases. From 2009 to 2011, he served as chief of the office's Public Corruption Unit, where he was the principal trial counsel in more than a dozen criminal trials and argued numerous appeals in the US Court of Appeals for the Second Circuit.

Between stints in the SDNY, Dan spent several years in private practice, where he handled criminal and regulatory matters for a number of major financial institutions and other clients.

Earlier in his career, Dan clerked for the Honorable Leonard B. Sand of the United States District Court for the Southern District of New York.


Columbia University
Phi Beta Kappa

Yale Law School, JD

Inscription au Barreau


  • New York


  • US District Court for the Southern District of New York
  • US District Court for the Eastern District of New York
  • US Court of Appeals for the Second Circuit
  • US Court of Appeals for the Third Circuit


  • Law360 White Collar Editorial Advisory Board
  • Ranked in Chambers USA, White-Collar Crime & Government Investigations – New York (2021)
  • Recognized by Legal 500 US, Corporate Investigations and White-Collar Criminal Defense (2021)