London--Reed Elsevier plc announced Thursday that it has appointed Marc Teren as CEO of Cahners Business Information, New York. Mr. Teren, who is currently CEO of Washingtonpost.Newsweek Interactive, starts with Cahners on Feb. 1. He takes over a company that has cut about 550 jobs in the past year and is struggling to integrate the Internet with its old media properties. "With his background and experience in building businesses, products and brand, including on the Internet, he will make a major contribution to the successful development of our leading portfolio of content," said Crispin Davis, Reed Elsevier's CEO, in a statement. Mr. Teren takes over the reins from Brian Nairn, who has been acting CEO since the resignation of Bruce Barnet late last year. A source close to Cahners says Mr. Nairn will remain with the company.