Martha Nelson, editor-in-chief of Time Inc. since January, has left her post as new CEO Joe Ripp will now require editors to report to the business side of the publishing company.

Norman Pearlstine, chief content officer at Bloomberg for the past five years, is rejoining Time Inc. to replace Nelson.

He assumes the new position of executive VP-chief content officer. Pearlstine was Time Inc. e-i-c from 1994 to 2005.

Ripp, in a staff memo, explained the restructuring as a move to develop effective collaboration across business and editorial lines is imperative if we are to succeed as an independent company."

He believes the new structure “will create a strong partnership between business and editorial, promote creativity and result in a cohesive vision for each of our brands that will be essential to long-term growth.”

Time Inc. is slated to be spun-off from Time-Warner next year. The company has agreed to buy American Express’ publishing arm.

Nelson was Time Inc.’s first e-i-c.