He helped GAO manage IT issues over a span of multiple administrations, supporting multiple congressmen and senators.
Powner will go on to return to the private sector, the report noted.
Suzette Kent, the federal chief information officer at GAO, will host a forum to discuss the shift of IT leadership at the agency.
At GAO, Powner has overseen prime IT modernization programs for federal government components such as the Internal Revenue Service, the Federal Aviation Administration, the Cheyenne Mountain Air Force Station and the National Weather Service.
These efforts encompassed the areas of enterprise architecture, software development and information security.