UTAS Associate Professor of public and environment policy Kate Crowley said it was pleasing that Senator Richard Colbeck and Johnathon Duniam were in the Ministry.

"It's unfair though not to include Tasmanians in Cabinet," Professor Crowley said.

"Cabinet discusses issues broadly and to have no Tasmanian voice is quite serious."

Senator Colbeck is the new Minister for Aged Care, Senior Australians, Youth and Sport.

Senator Duniam, who has only been in the Senate for three years, is Assistant Minister for Forestry, Fisheries and Regional Tourism as well as being promoted to Deputy Manager of Government Business in the Senate.

On Senator Colbeck's mixed bag of responsibilities, Professor Crowley said: "We have to be careful not to be ageist but it is a strange conglomeration to have sport, young people and aged care.

"Aged care should be in cabinet.

"It will be a real test for Senator Colbeck because it is not just about aged care but it is also about demographics and aged infrastructure planning."

She said Senator Duniam had "caterpaulted over Senator Colbeck for pre-selection" and now they would have to work closely together.

"It will be a challenge for Senator Duniam too because tourism is emerging, forestry is in decline and fishing highly contested," Professor Crowley said.

"He will also need a deft hand as deputy manager of government business because the government was only narrowly returned I wonder what skills he has for the job."

The last Tasmanian in federal cabinet was Senator Eric Abetz in 2015.