It is understood new general manager Greg Pawley has left his position because of his stance on reducing reliance on contractors.

The mine’s ventilation and gas drainage specialists have also seen high turnover with seven ventilation officers appointed over the last two years.

The mine is grappling with high levels of methane which have caused it to cease production on several occasions over the last 12 months when methane exceedances were too high.  

 A South32 spokesman told Australia’s Mining Monthly the company wouldn’t comment on individual employees.

“We have made several changes at Illawarra Metallurgical Coal which were necessary to ensure the operation is set up for long-term success,” he said.

“The changes are expected to help reset the mine’s culture and deliver a sustainable step change in productivity having re-established minimum performance criteria. 

“They will also reinforce accountabilities, build capability and increase our focus on taking a more disciplined approach to performance expectations in regards to safety, productivity and cost.”

Last month professional association members voted to take industrial action over rosters and award negotiation.

The Collieries Staff and Officials Association said deputies at Appin had overwhelmingly voted yes in a ballot to take a range of different industrial actions against South32. 

“The deputies have stood together and rejected the company’s unfair demand for them to work extra rostered hours for no extra pay,” it said.