* Martin Markle is Alliance Atlantis’ new production executive for Life Network and National Geographic Channel, having left as executive in charge of production of children’s and youth programming at CBC.

* Nelvana has promoted Lynn Chadwick to VP of the company’s worldwide sales and distribution department.

* Natalie Osborne, formerly of NBC Universal in the U.K., is now EVP of business development at 9 Story Entertainment.

* Ottawa’s Amberwood Entertainment has tapped Jonathan Wiseman as VP of sales and acquisitions.

* Sarah K. Clarke has joined CBS Paramount International Television as senior director of sales for Canada.

* Sarah Coursey has been promoted to European sales manager for Distraction Formats, and will report to the Montreal office from London.

* Jeanette Diamond, previously with Playback sales, is now manager for international sales at Tricon Films and Television.

* Studio B Productions in Vancouver has contracted licensing specialist Joy Tashjian as a consultant, specifically for The Amazing Andrenalini Brothers! series.

* Tie Domi has joined TSN as a hockey analyst following his retirement from playing in the NHL. He will appear during TSN’s weekly in-studio panel discussions and debates.