Dublin Port has agreed a joint venture with the Indonesian government to build a $900m container terminal at Sabang Port in Aceh.
The 50/50 joint venture involves setting up a new company - Sabang Hub International Port - which is likely to be operating within three months.
The company plans to build a 2,500m quay and a 22m deep harbour. The contract to operate the terminal will last for 50 years.
Most of the business at the terminal is likely to come from the transfer of containers from ship to ship.
Dublin Port is a semi-State company. This is its first overseas investment.