French firm Aveva has confirmed it will site a new wind turbine factory in Scotland.
The move will create up to 750 jobs in manufacturing and the wider supply chain.
The agreement was signed by the Chief Executive of Aveva, Luc Oursel, and the head of Scottish Enterprise, Lena Wilson, and was witnessed by Scotland's First Minister Alec Salmond.
Mr Salmond said: "Scotland shares Areva's vision of a cleaner tomorrow. Today's announcement provides a further boost to Scotland's position as one of Europe's key locations for offshore wind and takes us another significant step further in achieving our ambitious carbon reduction target."
Luc Oursel, CEO of Areva, said: "Areva's industrial heritage and diverse portfolio has placed us firmly at the forefront of low carbon technological solutions.
"Scotland is known to be a pioneer in renewables and its commitment to offshore wind in particular was a key part of our decision to locate our future UK manufacturing base there. This new facility is part of Areva's strategy to establish a manufacturing footprint that will cover the European market."
Scottish Enterprise chief executive Lena Wilson added: "This announcement further demonstrates Scotland's position as a leading contributor to the low carbon agenda and ambition to deliver safe and sustainable energy through advanced technology.
"Offshore wind is a key driver of the economic benefit of renewables and we will continue to work closely with Areva to support its development plans in Scotland and create ongoing opportunities for wider industry growth."
Prime Minister David Cameron described it as "brilliant news for Scotland".
He added: "the UK is now the world's biggest offshore wind market."