Manhattan District Attorney Cyrus Vance Jr. has brought in a Dechert white-collar defense partner and the head of an investigative firm as he builds out his executive staff at the start of his second term.

Vance announced the appointment of Benjamin Rosenberg, co-chair of Dechert’s white collar and securities litigation practice, as the office’s general counsel and the creation of a chief-of-staff position that will be filled by Jeffrey Schlanger, now president and chief executive officer of KeyPoint Government Solutions. Vance also named current communications director, Erin Duggan Kramer, 38, to deputy chief of staff in addition to retaining her communications director role.

Rosenberg, 54, is a 1985 graduate of Harvard University School of Law whose background includes four years as a Manhattan federal prosecutor. In 1994, Rosenberg joined the firm that is now Dechert. From 2007 to 2008, he served as chief trial counsel to the state Attorney General.

Effective Feb. 17, Rosenberg replaces outgoing general counsel, Caitlin Halligan, who left the office earlier this month (NYLJ, Dec. 24, 2013).

Schlanger, 60, is a 1978 New York University School of Law graduate spent 12 years as a Manhattan assistant district attorney at the start of his career. Schlanger then began his own investigative firm that was sold to Kroll. While at Kroll, he founded its government services subsidiary and worked with William Bratton, who is now New York City’s police commissioner. Kroll Government Services was sold in 2009 and renamed KeyPoint Government Solutions. His appointment at the district attorney’s office is effective Feb. 3.