Prime Minister David Cameron has welcomed the news of a £100 million deal for Belfast weapons firm Thales to supply the Indonesian Ministry of Defence.
Thales - which builds a range of missiles used by countries across the globe - employs some 500 staff at Belfast and Crossgar.
The new export order is for its three products, including the STARStreak short range air defence system.
Enterprise Minister Arlene Foster also welcomed the deal.
"Thales is a world class defence company with a global reputation and has been working hard to secure new export business," she said.
"This valuable contract represents a break through in Air Defence sales for Thales UK and will help sustain jobs at the firm’s sites in Northern Ireland."
The firm - which is part of Thales’ Land and Air Systems operations - employs around 500 people at its design and manufacturing facility in Belfast and at its integration facility at Crossgar, Co Down.