Sun is to lay off around 4,400 employees in the wake of the economic downturn.
The figure, 11 per cent of the Sun workforce, came as the company reported a net loss of $111m for the first fiscal quarter.
Although this figure is better than the $180m loss Sun suffered at the same time last year, its revenue was $2.75bn, down four per cent from $2.86bn last year.
A year ago, Sun laid off 3,900 employees - nine per cent of its workforce.
Steve McGowan, chief financial officer, said: "Sun has done an outstanding job in maintaining fiscal discipline but it hasn't been enough to counterbalance revenue shortfalls caused by the protracted economic downturn.
"We believe the actions announced today are necessary to return Sun to profitability."
With these cuts, which will take out about $100m in quarterly costs, Sun should be able to make a profit in the second half of its fiscal year, ending 30 June.
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