The DOI OIG (Office of Inspector General) is an independent oversight organization dedicated to promoting accountability, integrity, economy, efficiency, and effectiveness within the U. S. Department of the Interior (DOI).

Their mission is to safeguard taxpayer dollars from fraud and mismanagement while promoting public trust in government by identifying and preventing misconduct. With a broad portfolio that includes managing millions of acres of public lands, handling billions of dollars in acquisitions and royalty collection, and ensuring the well-being of American Indians and Alaska Natives, the DOI's work carries significant stakes for the public. The DOI OIG conducts independent investigations, audits, inspections, and evaluations to identify fraud, waste, abuse, or mismanagement and provides recommendations for improvement.

Their findings are shared with Department officials, Congress, law enforcement entities, and the public to prompt corrective action and prevent wrongdoing. Additionally, they conduct outreach efforts to inform employees, contractors, grantees, and tribes about the consequences of wrongdoing and how to report problems. Through their work, the DOI OIG aims to make a positive change within the DOI, promoting a culture of efficiency, effectiveness, and accountability