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Claudius B. Modesti 
Director 
Division of Enforcement and Investigations 

Claudius B. Modesti, Director of the Division of Enforcement and Investigations (DEI), leads a team of attorneys, accountants, and other professional staff in investigations and litigation of possible violations of PCAOB rules and other applicable securities regulations. Mr. Modesti joined the PCAOB in May 2004 as the first DEI Director and has built the Division from its inception. Currently, Mr. Modesti serves as the Vice Chair of the Enforcement Working Group for the International Forum of Independent Audit Regulators (IFIAR).

Before arriving at the PCAOB, Mr. Modesti, was an Assistant United States Attorney for the United States Attorney’s office for the Eastern District of Virginia where he led the investigation and prosecution of white collar crimes with an emphasis on securities fraud. He was also appointed corporate fraud coordinator for the office.

Prior to joining the United States Attorney’s office, Mr. Modesti served as a trial attorney for the Department of Justice, Criminal Division, and spent four years in the Division of Enforcement at the Securities and Exchange Commission. Mr. Modesti also served as a law clerk for the Honorable J. Frederick Motz, Judge, U.S. District Court for the District of Maryland.

Mr. Modesti earned a B.S. in Foreign Service from Georgetown University and a J.D., magna cum laude, from the Georgetown University Law Center.