Mark A. Adler

Acting Director

Division of Enforcement and Investigations

Mark A. Adler is the Acting Director of the Division of Enforcement and Investigations (DEI). In this role, he advances the organization's investigations and litigation of violations of PCAOB rules and other applicable securities regulations. 

Mr. Adler rejoined the PCAOB as DEI’s Acting Director in September 2022. During Mr. Adler’s previous tenure as Acting Director of DEI from June 2018 to January 2020, the Division brought significant cases that addressed serious auditor misconduct at large and small audit firms involving both U.S. and non-U.S. auditors. Mr. Adler also represented the PCAOB in the Enforcement Working Group of the International Forum of Independent Audit Regulators, leading workshops on a variety of enforcement topics. Mr. Adler also previously served as Deputy Director and Chief Trial Counsel in DEI and oversaw and litigated complex enforcement proceedings. 

Before joining the PCAOB in 2010, Mr. Adler worked for 13 years at the Securities and Exchange Commission (SEC) in the Division of Enforcement, where he served as both Acting Chief and Deputy Chief Litigation Counsel. During his SEC tenure, he litigated and advised on a wide range of matters, including complex financial fraud, insider trading, offering fraud, and emergency relief cases. 

Mr. Adler spent more than nine years at the Department of Justice where he investigated, prosecuted, and tried major white collar criminal cases. Early in his career, Mr. Adler handled civil litigation and other general commercial matters in private practice in New York. 

Mr. Adler earned his B.S.E. in computer science and applied mathematics, summa cum laude, from Tufts University and his J.D. from Harvard Law School.