Accountancy and consulting firm KPMG is to create 800 jobs this year.
The new roles will be spread across the company's offices in Dublin, Belfast, Cork and Galway.
KPMG currently employs 3,300 people in Ireland, up from 2,000 six years ago.
It said its growth is being driven by the needs of its clients in technology related areas such as cyber security, digital and data analytics.
Demand is also increasing for its services and expertise around sustainability and decarbonisation, caused by the focus on climate change, it added.
Half of the positions will be for experienced professionals, with the other 400 to be filled by graduates as part of the firm's annual college leaver intake.
They will take up jobs in areas like audit and assurance, tax, deal advisory and consulting.
The company said there will be further opportunities in traditional parts of its business including regulatory advisory, corporate finance and transaction services.
"The twin challenges of rapid technological change and increased regulation are among the key business drivers for Irish business leaders and are reflected in the growth in demand for our services allied to continued increasing demand for our audit, tax and advisory expertise," said Seamus Hand, KPMG Ireland Managing Partner.
In 2018 KPMG Ireland had revenues of €414m.
Its growth in Ireland in recent years is in contrast to KPMG in the UK, which is struggling with falling profits and the fallout from a number of reputational setbacks.