Triggered by the departure of Finance Minister Mathias Cormann, Prime Minister Scott Morrison says the key Cabinet portfolios remain unchanged.
After Simon Birmingham replaced Mathias Cormann in Finance, Dan Tehan is moving into Trade.
National security ministers Peter Dutton, Linda Reynolds and Melissa Price are to remain in their portfolios of Home Affairs, Defence and Defence Industry, respectively.
Former soldier Andrew Hastie is to become assistant defence minister.
After coming under pressure as Aged Care Minister at the peak of the second wave, Senator Richard Colbeck has lost the portfolio although he keeps Senior Australians and Aged Care Services.

Education Minister Dan Tehan at Parliament House in Canberra. Source: AAP
Former Immigration Minister Alan Tudge goes to Education, while Alex Hawke has been elevated to Immigration and Citizenship.
And ACT Senator Zed Seselja will go to International Development and the Pacific.
Jane Hume will enter the ministry with responsibility for financial services and the digital economy.
Labor's Deputy Leader Richard Marles says it's an uninspiring line-up.