It is expected that US software company, Salesforce, will announce significant investment plans tomorrow that could lead to the creation of up to 1,500 jobs in Dublin.
If confirmed, it could represent one of the largest single jobs announcements by a multinational company in Ireland.
The Californian firms makes customer relationship management (CRM) and business cloud computing software.
A spokesperson said tonight that the company does not comment on speculation.
Salesforce has been in Ireland since 2000, when it set up a small team to provide multilingual pan-European technical support.
This was quickly followed by an inside sales team and in 2012 the firm announced it was creating 100 positions in the capital to meet the demands of continued growth in Ireland.
On that occasion the company sought to hire qualified professionals in sales, marketing, IT and customer support.
One year later, it announced it would recruit a further 100 staff here and opened a second 50,000 sq ft office in the city.
Today it employs around 1,400 people in Leopardstown in Dublin, so confirmation tomorrow that it intends to grow its workforce by 1,500 would see its employee numbers here more than double.
Salesforce provides services to 150,000 companies around the world and employs around 30,000 people.
The company was founded 20 years ago by former Oracle executive, Marc Benioff, who is now estimated to have amassed a personal fortune of over $6bn.
The firm has estimated that it will have revenues of up to $16bn this year.