JUNEAU - Gov. Sarah Palin's Chief of Staff Mike Tibbles has resigned.
Palin accepted Tibbles' resignation while announcing several other changes to her administration on Thursday.
Tibbles has worked for Palin since she took office in December 2006, working through two regular legislative sessions and two special sessions.
He did not immediately return phone messages. It is not immediately known what Tibbles will be doing next or why he stepped down.
No successor has been named, but Palin's deputy chief of staff, Mike Nizich, will serve as the interim chief until one is named.