Network Ten's chief programming officer David Mott has resigned from the channel after 16 years.
In a statement released on today Ten's chief executive James Warburton, called Mr Mott a "fantastic asset for the network".
"David's legacy at Ten includes landmark television programs such as MasterChef, Australian Idol, Rove Live, The Biggest Loser, Thank God You're Here, The Project and Big Brother, and more recently Offspring, Puberty Blues, MasterChef All Stars and Bikie Wars: Brothers In Arms," Mr Warburton said.
It's been a difficult week for Ten following on the axing of Everybody Dance Now on Tuesday, and poor ratings for its new reality show, I Will Survive.
"It's a sad day when you say goodbye to friends and colleagues, and leave a place you hold so dear," Mr Mott said.
"But it's a great day when you take stock on what has been achieved over 16 fantastic years.
"I am proud of the bold programming decisions we have made at Ten over that time, because without risk there is less chance of success," he said.
"In a job where you live and die by the numbers, perhaps I've been luckier than most. It's been a great ride, and I've loved every second of it. I leave behind a focused and committed creative team and I wish them all the best for the future."
Other recent shows for Ten that have had luke-warm ratings include Being Lara Bingle and The Shire.