Dr. Brett Baker is the Assistant Inspector General for Audit (AIGA) at the Nuclear Regulatory Commission Office of Inspector General (NRC OIG). Previously he served as the Deputy Inspector General for Audit for the Department of Defense OIG. He also served as the AIGA at the National Science Foundation OIG, AIGA at the U.S Department of Commerce OIG, and the Director for Internal Review at the Defense Finance and Accounting Service. He started his civilian government career with the U.S. Department of Education OIG.

Dr. Baker earned a doctorate in Information Technology and Systems Management from the University of Maryland University College. He holds a master's degree in Information Systems Management from the Central Michigan University, a bachelors' degree in Accounting from the University of Northern Iowa, and a bachelor's degree in Sociology from Iowa State University. He is also a Certified Public Accountant and a Certified Information Systems Auditor.

Dr. Baker serves as the Chair of the Federal Audit Executive Council, and is a member of the Accounting and Auditing Policy Committee of the Federal Accounting Standards Advisory Board (FASAB). In addition, he serves on the Government Accountability Office's Yellow Book Advisory Council and Green Book Advisory Council. He is also a member of the Information Security and Privacy Advisory Board (ISPAB). Dr. Baker has also published articles on auditing and data analytics, and is a frequent speaker at national conferences. 

Dr. Baker is a recipient of the 2015 Donald L. Scantlebury Memorial Award for Distinguished Leadership in Financial Management Improvement awarded by GAO, OMB, and Treasury. He has also received four Awards for Excellence from the Council of the Inspectors General on Integrity and Efficiency.

Dr. Baker is an U.S. Army veteran.