Mr Gray had been minister for this portfolio when Labor was in government.
Mr Gray also retained his Northern Australia portfolio and special minister of state portfolios.
‘Jobs in the resources sector continue to be important for the people of Rockingham, Kwinana and Mandurah,’ he said.
Mr Gray was a Woodside executive before entering politics and proved a popular choice as Resources and Energy Minister when he was promoted to the position in March.
‘Developing the north of our country represents a great opportunity to advance our nation.’