(Diego M. Radzinschi/ALM)

Daniel Stein, chief of the criminal division at the Southern District U.S. Attorney’s Office, is joining Mayer Brown as a partner, where he will lead its regulatory and investigations group and co-lead its white collar defense and compliance group.

Meanwhile, Lisa Zornberg, a partner at Lankler Siffert & Wohl, is anticipated to be named the new chief of the criminal division. She served in the office from 1998 to 2012.

Stein, 42, had two stints in the Manhattan federal prosecutor’s office. He joined in 2003 and was chief of the public corruption unit from 2009 to 2011.

Daniel Stein

He left to become a partner at Richards Kibbe & Orbe, and returned to the Southern District in 2014 as chief counsel. He was named head of the criminal division in July 2015, where he supervised about 160 other prosecutors, including those trying former New York state lawmakers Sheldon Silver and Dean Skelos on public corruption charges.

Stein will leave the prosecutor’s office in early November and will start at Mayer Brown on Nov. 28. He said he didn’t have a prior connection to Mayer Brown but “learned about the firm by practicing in this area for a long time” and praised its talent and client base.

Stein is the latest lead prosecutor to leave the Southern District for private practice this year, joining the heads of the office’s civil division, complex frauds and cyber crime, narcotics, public corruption and terrorism units (NYLJ, June 9; Sept. 22).

Stein said the office sees significant turnover every year and that he knew in 2014 he would stay for two years. At Mayer Brown, Stein will represent financial services firms on securities enforcement, investigations, white collar criminal defense and civil litigation.

Daniel Stein, chief of the criminal division at the Southern District U.S. Attorney’s Office, is joining Mayer Brown as a partner, where he will lead its regulatory and investigations group and co-lead its white collar defense and compliance group.

Meanwhile, Lisa Zornberg, a partner at Lankler Siffert & Wohl , is anticipated to be named the new chief of the criminal division. She served in the office from 1998 to 2012.

Stein, 42, had two stints in the Manhattan federal prosecutor’s office. He joined in 2003 and was chief of the public corruption unit from 2009 to 2011.

Daniel Stein

He left to become a partner at Richards Kibbe & Orbe , and returned to the Southern District in 2014 as chief counsel. He was named head of the criminal division in July 2015, where he supervised about 160 other prosecutors, including those trying former New York state lawmakers Sheldon Silver and Dean Skelos on public corruption charges.

Stein will leave the prosecutor’s office in early November and will start at Mayer Brown on Nov. 28. He said he didn’t have a prior connection to Mayer Brown but “learned about the firm by practicing in this area for a long time” and praised its talent and client base.

Stein is the latest lead prosecutor to leave the Southern District for private practice this year, joining the heads of the office’s civil division, complex frauds and cyber crime, narcotics, public corruption and terrorism units (NYLJ, June 9; Sept. 22).

Stein said the office sees significant turnover every year and that he knew in 2014 he would stay for two years. At Mayer Brown , Stein will represent financial services firms on securities enforcement, investigations, white collar criminal defense and civil litigation.