Senior politicians, business figures and philanthropists have praised Sir Ian Wood's lasting contribution to the economy, the North-east and communities around the world.
First Minister John Swinney described Sir Ian as "one of Scotland's most influential business leaders and philanthropists" whose leadership transformed Wood Group into a global energy services company while helping establish Scotland as "a world-renowned centre of energy expertise."
He also praised Sir Ian's commitment to Aberdeen, economic development and philanthropy through The Wood Foundation, adding: "Sir Ian Wood’s legacy is one of enterprise, leadership and generosity. He has helped shape modern Scotland, strengthened its economy, advanced its energy industry and demonstrated the profound difference that purposeful philanthropy can make."
Scottish Secretary Douglas Alexander said: "Sir Ian Wood was one of Scotland’s finest sons. Ian was a giant of Scottish business, philanthropy and society. A proud son of the Aberdeen he was a tireless advocate for the Granite City and its people."
He added: "Personally, it was a privilege to be able to know him, work with him on his philanthropic endeavours and like so many, many Scots I mourn his passing."
Former Prime Minister David Cameron hailed Sir Ian as "one of Scotland's great entrepreneurs and industrial leaders – a true titan of Scottish industry."
Reflecting on commissioning the Wood Review, he said: "He was the perfect choice to lead the Wood Review during my time as Prime Minister. Through is vision and leadership, he helped shape the future of the UK's North Sea oil and gas sector for years to come, striving to maximise North Sea revenue and increase the economic benefits from North Sea oil and gas."
He added that Sir Ian was "a thoroughly kind and decent man" who would be "sorely missed".
Russell Borthwick, chief executive of Aberdeen & Grampian Chamber of Commerce, said Sir Ian was "one of the most influential figures in the modern history of the North-east of Scotland."
He said: "Sir Ian believed passionately that business should be a force for good. Alongside his extraordinary commercial success, his philanthropy, support for education and commitment to economic development have transformed communities and created opportunities for generations."
He added: "The North-east has lost one of its greatest champions, and his contribution to our region will never be forgotten."
Martin Gilbert, founder of Aberdeen Asset Management and chairman of Revolut, said he had known Sir Ian for more than four decades.
He said: "Sir Ian Wood was a giant of Scottish business. I had the privilege of knowing and working with him for more than 40 years, and his extraordinary work ethic, attention to detail and natural charisma always stood out."
He added that Sir Ian had been "incredibly supportive" during Aberdeen Asset Management's early years and concluded: "Building a truly global company from Aberdeen was a remarkable achievement, and no one has contributed more to the North-east of Scotland. He was an exceptional businessman and an amazing man."
Hydrasun executive chairman Bob Drummond described Sir Ian as both a mentor and father figure after joining Wood Group in 1992.
He said: "Over the years, I came to know not only one of the finest business leaders I have ever had the privilege to work alongside, but someone I regarded as a father figure."
Recalling Saturday morning meetings over "a cup of tea and a rowie", he added: "Sir Ian's contribution to Aberdeen, the North-east and Scotland is beyond measure. He built a remarkable global business, but he also transformed communities through his generosity, his vision and his unwavering belief in the potential of this region."
Entrepreneur and philanthropist Sir Tom Hunter said Sir Ian had been "one of my heroes".
Remembering one of their first meetings, he recalled arriving in a flashy car while Sir Ian left in "an old taxi" to catch the train back to Aberdeen.
"I learned a lot from Ian - firstly don't show off; he wore his wealth lightly," Sir Tom said.
"From humble beginnings to building a global empire, to being a great philanthropist, Scotland was lucky to have him."
He concluded: "Ian, I'll see you down the road my friend."