A Liberal frontbencher has dismissed concerns Christopher Pyne's new job of overseeing the nation's naval shipbuilding could favour his home state of South Australia.
Defence Personnel Minister Dan Tehan insists the newly-appointed defence industry minister understands shipbuilding is a nation-building project.
"Christopher is an Australian first and foremost," Mr Tehan told ABC radio on Tuesday.
Prime Minister Malcolm Turnbull's new-look ministry will be sworn in by Governor-General Sir Peter Cosgrove on Tuesday.
Mr Turnbull stuck broadly with the same team of ministers he took to the federal election but created several new roles, including Mr Pyne's appointment as defence industry minister.
That gives him oversight of the nation's naval ship building, including the $50 billion future submarine program.
Mr Tehan insisted his leader got the balance right when it came to the new frontbench, amid criticism conservative backbenchers were snubbed.
Another frontbencher, Steve Ciobo, insisted the party was blind to factions.
"We leave it for media commentators to get excited about these sorts of things; it's just not something I'm worried about," he said.
Queensland senator Matt Canavan, who takes on the resources and northern Australia portfolios, will be elevated to cabinet, reflecting the greater number of Nationals members in the coalition post election.
The cabinet will grow from 22 to 23 ministers.
The prime minister had promised to keep the same line up prior to the election but was forced to fill the positions of Wyatt Roy and Peter Hendy who lost their seats.
