Media conglomerate Bertelsmann is set to name Hartmut Ostrowski, the head of its printing and media services division, as the group's new chief executive on Friday, sources familiar with the matter said.

"It's clear that Ostrowski will be the new CEO," one person who is close to the privately held German company told Reuters on Tuesday, requesting anonymity.

An industry source familiar with the situation also said Ostrowski would be chosen when the supervisory board of Europe's biggest media group meets on Friday.

A spokesman for Bertelsmann -- whose businesses include RTL television, music company Sony BMG, a joint venture with Sony Corp. and U.S. publishing giant Random House -- declined to comment ahead of the supervisory board meeting.

Ostrowski has run Bertelsmann's arvato division since 2002. Arvato provides printing, logistics and information technology services.

In 2005, arvato's sales rose 16 percent to a record 4.4 billion euros ($5.7 billion) -- almost one-quarter of Bertelsmann's total sales -- while its operating result rose 10 percent to 341 million euros.

Bertelsmann has said a new CEO to replace Gunter Thielen, who is due to step down in August, will come from its current management team.