Office of Legal, Legislative, & External Affairs


Assistant Inspector General for Legal, Legislative, and External Affairs

Brian A. Dettelbach

As Inspector General for Legal, Legislative, and External Affairs, Mr. Dettelbach oversees the Office of Legal Counsel, which is responsible for providing legal advice to and representation for the Office of Inspector General on a wide range of issues. The Office of Counsel comprises the Chief Counsel and staff attorneys who provide opinions on laws pertaining to the conduct, findings, and recommendations of OIG audits and investigations; develop analyses of questions regarding OIG authority, general management, and transportation-related laws; render assistance to U.S. Attorneys for criminal cases investigated by OIG Special Agents; represent OIG in civil and administrative proceedings; and manage the OIG’s Freedom of Information Act (FOIA) and ethics programs.

Mr. Dettelbach also oversees the Office of Congressional and External Affairs including the Director and staff who facilitate communications, outreach, and technical assistance with key OIG stakeholders throughout the Department and Administration, Congress, the media, and general public; and manage social media and website initiatives. In addition, he represents the Inspector General and participates in activities of the Council of the Inspectors General on Integrity and Efficiency (CIGIE).  

Prior to arriving at DOT OIG, Mr. Dettelbach served as Counsel for the then-Senate Committee on Governmental Affairs. Mr. Dettelbach's portfolio included government operations, oversight and investigations, appropriations, and Presidential nominations. In that role, Mr. Dettelbach worked extensively with the Office of Management and Budget (OMB), Inspectors General, Chief Financial Officers, and the Government Accountability Office (GAO).  

Mr. Dettelbach has been recognized for his achievements within the Inspector General community, earning three CIGIE Awards for Excellence and CIGIE's 9/11 Award. In 2012, he was the recipient of the Inspector General’s Distinguished Service Award, DOT OIG’s most prestigious honor. He also has received several Secretarial Team Awards. Mr. Dettelbach has written two articles appearing in the OIG Community’s Journal of Public Inquiry. 

Mr. Dettelbach joined DOT OIG in 1997. He received a Bachelor's degree in Foreign Service from Georgetown University and a Juris Doctor degree from the George Mason University School of Law.  

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