• Paul Anderson and Mark Fennessy speak at Melbourne MasterChef launch
Webb-Sear is currently group general manager of finance at Fairfax Media Limited.
Oetjen featured in season one of The Bachelor Australia with Tim Robards in 2013.
The announcement comes after the departure of Ita Buttrose from Studio 10.
He was also a contributor to 3AW.
Shoebridge will leave his current role on May 25, but will continue to work with Ten as a consultant.
Other guests on tonight's episode include Tom Holland, Emily Blunt and John Krasinski.
MasterChef Australia contestants will cater for 150 of His Royal Highness’s guests.
The series is hosted by TV Week Gold Logie Winner & AFI Award-winning actor Gyton Grantley and Lara Shannon.
Ambulance provides a gripping and authentic look at the demands and dilemmas faced by first responders.
Cummins was recently announced as co-host with of Netflix’s Ultimate Beastmaster alongside Dannii Minogue.
Fiona won $100,000 for her chosen charity, Angel Flight.
• Peter Overton speaks of wife's courage to step away from TV for family
Dagan will be responsible for Ten’s news content and operations across all platforms
