Some 19,000 jobs are to be cut worldwide at the US consultancy company Accenture.
It is the equivalent of around 2.5% of its total workforce.
The company employs around 6,500 people in Ireland, with fears for some 400 jobs here.
More than half of the losses globally are set to come from its human resources, IT, finance and marketing departments over the next 18 months.
Accenture's announcement came as it also lowered its annual forecasts.
It is now predicting revenue growth to be between 8% and 10% - compared with its previous projection of an 8% to 11% increase.
The firm further expects to pay US$1.2 billion (€1.10bn) in severance costs, but hopes to save around US$1.5bn (€1.38bn) by closing offices.
It is the latest in a string of job losses in the corporate and tech sectors, following a fall in demand amid high inflation and rising interest rates.
Amazon, Facebook owner Meta, and Google are among those who have recently announced cuts.
An Accenture spokesperson said: "While we continue to hire, especially to support our strategic growth priorities, during the second quarter of fiscal 2023, we initiated actions to streamline our operations and transform our non-billable corporate functions to reduce costs.
"Over the next 18 months, these actions are expected to result in the departure of approximately 19,000 people (or 2.5% of our current workforce)."
Additional reporting: IRN