"Whether we were for sale or not, we would be doing this."
It wasn't a "slash and burn exercise", he said.
Closure remained an option for Stockton.
"We have looked at it closely but we believe we have strengthened the financial position by making these changes."
The proposed job cuts would not alter the mine's Monday-to-Friday operation, nor would they alter production, Mr Clifford said.
Solid Energy staff have until March 22 to provide feedback to the proposal. The company will make a final decision at the end of the month.
Stockton mine employed over 1000 people before Solid Energy hit the skids in 2012.
- WPN