Jennifer Psaki will start work as Obama's traveling press secretary in July. Psaki started working for Obama during his 2008 campaign and served in the White House, rising to the post of deputy communications director.
Psaki left the White House in September to work for a public relations firm in Washington. A campaign official says she will take leave from the firm while working for the campaign.
The official says Psaki always planned to rejoin Obama on the campaign when the president stepped up his re-election effort.
The official spoke on the condition of anonymity because the personnel move had not been officially announced.