Optus is cutting more jobs as it works to improve profitability and customer satisfaction.
The company would not confirm reports up to 200 positions may be lost, but said it would be discussing cuts with employees in the coming days.
"Shortly we will be talking to our employees about some changes we're making," a spokesperson said.
"Our priority is always to communicate the detail of any change directly with our employees and support those who might be affected."
More details on how many staff will lose their jobs are expected in a week.
Optus has already reduced staff numbers as part of its plans to improve revenue and earnings, which include changes to its retail business and overall structure.
Over the nine months to December 31, 2013, it had an average of 8,685 employees, down from 9,130 in the same period a year earlier.
"Optus continually reviews its operations to ensure it has the right organisational structure in place to achieve its business goals, and we've been continuing to do so within the context of the business strategy we launched 18 months ago," the Optus spokesperson said.
Those changes have recently delivered profit growth, with the company making a net profit of $722 million in the nine months to December 31, up from $480 million in the same period a year earlier.
But its revenue has been falling, dropping by more than 12 per cent to $7.6 billion in the same nine months.
