National Economic Council adviser Gene Sperling will extend his White House tenure once more, he told reporters Monday, serving through most of February before handing the job over to his successor Jeffrey Zients.

Zients was originally supposed to take over for Sperling by the end of 2013; Sperling has occupied the post since January 2011, and is joining his family in California. But that was before the former acting director of the Office of Management and Budget agreed to oversee the overhaul of in the wake of the online health insurance system's botched rollout. Zients made significant improvements to the Web site in about six weeks, and while it continues to experience some problems, he handed over those duties to former Microsoft executive Kurt DelBene in mid-December.

Still, Zients said he needed some time to get up to speed before replacing Sperling. Initially, the handover was supposed to take place at the beginning of February.