Dale joins BP from the Bank of England where he is currently Executive Director for Financial Stability Strategy and Risk. He is also a member of the Bank's Financial Policy Committee, BP said in a statement.
He replaces Christof Ruhl, BP's highly respected chief economist, who quit the company to become the first global head of research at Abu Dhabi Investment Authority.
Ruhl, 55, is credited with enhancing the public profile of BP's economic research. His job was to provide senior management with insights on economic and energy market trends that helped to mould the company's strategy.
BP said as Group Chief Economist, Dale will be responsible for advising the company Board and executive team on economic drivers and trends in global energy.
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"He will lead an international team of senior economists whose responsibilities include overseeing the preparation and presentation of the annual BP Statistical Review of World Energy and the BP Energy Outlook," it said.
In his previous capacity as the Bank's Chief Economist, Dale served for six years on the Monetary Policy Committee.
Welcoming the appointment, Dev Sanyal, BP's Executive Vice President Strategy and Regions, said: "Spencer's deep experience in central banking and his communications and financial markets background will be invaluable as we look to understand the future of energy markets globally.