In 1997, at age 20, she won the contest organized by Ouest-France that allowed her to become a member of the jury at the British film festival of Dinard, under the presidency of Kristin Scott Thomas.
In September 2007, she presented the musical program Musicronik on W9, where she gave information, commented new albums, concerts and web tendencies, and also interviewed celebrities.
From 2005 to 2009, Sidonie Bonnec presented live every Wednesday evening during 5 seasons Nouvelle star, ça continue with Jérôme Anthony and Alexandre Devoise, where she interviews the contestants, musicians, technicians, and members of the jury.
In March 2010, Sidonie Bonnec presented Destins extraordinaires on W9, a weekly program of 70 minutes of several reportages portraying people with an uncommon path like anonymous heroes and personalities.
On 29 April 2011, she presented on the same channel a special program dedicated to the wedding of Prince William and Catherine Middleton.
Since September 2008, she presented on W9 the program Enquêtes criminelles : le magazine des faits divers during eight consecutive years until June 2015 and then being replaced.
[4] In March 2017, she arrived on France 2 to co-host daily with Olivier Minne the game show Tout le monde a son mot à dire.