Two days before its networks revealed their fall plans in full, CanWest MediaWorks switched presidents - replacing Rick Camilleri with longtime senior exec Peter Viner.

Viner is the former publisher of the National Post and CEO of TEN Television Network in Australia, both held by MediaWorks' parent CanWest Global Communications. He was also president and CEO of CanWest Global before giving up the post to Leonard Asper.

Camilleri has left the company after three years in its upper ranks. Before taking charge of newly formed MediaWorks, a post he kept for just eight months, he was CanWest Global's COO.

There have been many new faces and just as many rolling heads at CanWest in recent months as its two networks, Global and CH, have struggled to keep up with distant first-place CTV. MediaWorks also recently hired Walter Levitt as senior VP of marketing, luring him from a similar post at Alliance Atlantis Communications.

Former Toronto 1 boss Barbara Williams also joined the company in February, joined recently by producer Zev Shalev and newsman Ben Chin, also from Toronto 1.

-www.canwestglobal.com