M2 Telecommunications Group (MTU) will cut around 100 jobs as part of a restructure occasioned by recent acquisitions.
In a statement to the Australian Securities Exchange, M2 said following an extensive review it had identified a number of roles across administration, customer service and sales which were redundant in the merged business.
"These changes affect approximately 100 team members, each of whom have been or will be consulted with over the coming days to explore opportunities for redeployment within the company," the group said.
The company added where redeployment was not possible or not of interest to a team member, redundancies may occur.
M2 chief executive officer Geoff Horth said the group was taking the matter and the impact on staff very seriously.
"This was a carefully-considered and difficult decision," he said.
"We place a high value on our team so today we are committed to spending time with affected team members and we will be working over the course of this week to explore all possible avenues for redeployment."