Mark L. Greenblatt

Honorable Mark Lee Greenblatt, Inspector General
U.S. Department of the Interior

The Honorable Mark Lee Greenblatt began his tenure as the Inspector General for the U.S. Department of the Interior (DOI) on August 26, 2019, after being confirmed by the U.S. Senate. As the Inspector General, Mr. Greenblatt leads a nationwide workforce of investigators, auditors, evaluators, attorneys, and support staff. Their mission is to provide independent oversight to promote accountability, integrity, economy, efficiency, and effectiveness within the DOI. Mr. Greenblatt is the senior official responsible for providing oversight of the programs and operations of the DOI, which has more than 70,000 employees and a range of diverse programs, including roughly $10 billion in grants and contracts, $20 billion in natural resource revenues, Federal trust responsibilities to 574 federally recognized Indian Tribes and Alaska Native villages, stewardship of 20 percent of the Nation’s lands, and management of lands, subsurface rights, and offshore areas that produce approximately 17 percent of the Nation’s energy.

In December 2022, Mr. Greenblatt was elected by the membership of the 74 Federal inspectors general to serve as the Chair of the Council of the Inspectors General on Integrity and Efficiency (CIGIE). Mr. Greenblatt’s 2-year term as Chair began on January 1, 2023. In this role, he leads the Inspector General community’s mission to combat fraud, waste, and mismanagement. From January 2021 to December 2022, Mr. Greenblatt served as the CIGIE Vice Chair.

Mr. Greenblatt has been in the Federal oversight community since 2003 as part of the legislative and executive branches. Before becoming the DOI Inspector General, he served as the executive director of CIGIE. He previously held leadership roles at the U.S. Department of Commerce Office of Inspector General (OIG) and the U.S. Senate Permanent Subcommittee on Investigations. Mr. Greenblatt also served as an investigative counsel at the U.S. Department of Justice OIG. Over the course of his Federal career, he has received several awards, including a CIGIE award for excellence, U.S. Department of Commerce gold medal and bronze medals, and a U.S. Department of Justice OIG distinguished service award.

Mr. Greenblatt served as a Federal law clerk, was a litigator at two large, international law firms, and is a published author.

Mr. Greenblatt graduated from Columbia University School of Law, where he was a Harlan Fiske Stone Scholar, and earned his undergraduate degree from Duke University. He also completed the Senior Managers in Government Fellowship at Harvard University’s Kennedy School of Government.