One of the ABC's top bosses has issued a mea culpa over the broadcaster's handling of several recent controversies in its news division, acknowledging it needs to bolster editorial oversight.

The ABC has copped criticism this month over the execution of the so-called Cabinet Files series, its subsequent apology to former prime minister Kevin Rudd and the publication of taxation stories by chief economics correspondent Emma Alberici.

In an email to staff on Tuesday, the ABC's head of news Gaven Morris announced a restructure of senior positions at the broadcaster and conceded there had been "a number of editorial issues" and indicated a need to improve processes, particularly with regard to the ABC's online output.

Emma Alberici's piece was controversially removed from ABC sites.

"Mainly we are making these changes because continually improving our standards and work is integral to our commitment to provide all Australians with quality, original journalism," he wrote.