Regulating energy development; conserving land and water resources; protecting wildlife; conducting scientific research; preserving national parks, monuments, and heritage areas; and addressing American Indian concerns. These diverse activities and more are the responsibility of the U.S. Department of the Interior (DOI).

The mission of the Office of Inspector General (OIG) is to provide independent oversight and promote excellence, integrity, and accountability within the programs, operations, and management of the U.S. Department of the Interior.

We are a highly motivated organization of about 265 employees conducting independent oversight and responding in the best interest of American taxpayers to ensure that DOI earns the public’s trust. We are alert to waste, fraud, and mismanagement, whether expressed as administrative waste or criminal activity, and we use a range of audit and investigative tools to ensure that the Secretary of the Interior, Congress, and the public are informed when changes to DOI programs become necessary to achieve this goal.

References to non-Federal entities or people ≠ endorsement by the U.S. Government.


Natural Resources

Interior Office of Inspector General

Mark Lee Greenblatt

Doug Tu

Richard Carter

Msc Robert Whalen

Morgan Reynolds

Jennifer Dure

Jill Baisinger

Summer Crawley

Sheree Tanner

Sarah Jane

Ryan Mock

Roxanna D.

Robert S.

Michael Baron

McKenzie Kotara

Matt Siebert

Kathleen Sedney

Jorge A. Christian

John Matussak

Jennifer Fedewa

Brendan Burke

Hannah Kraus

Emily Hicks

Donald W Cairns

David Little

Daphne Fabiano Cpa

Daniel Coney

Brooke Holloway

Benjamin Schott

Alan Skerl

Bridgid Castorina

Terrance Mullen

Audit and Compliance

Legal and Investigative Roles

Cybersecurity and Information Security

Data Analysis and Management

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Teams at Interior Office of Inspector General

Audit and Compliance

Legal and Investigative Roles

Cybersecurity and Information Security

Data Analysis and Management

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Teams at Interior Office of Inspector General

Audit and Compliance

Legal and Investigative Roles

Cybersecurity and Information Security

Data Analysis and Management

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