Taylor-Smith, who is 51, worked for G4S between 1998 and 2012, most recently in the role of chief operating officer and regional chief executive of UK, Ireland and Africa. At G4S, he was responsible for revenues of Â£2.4bn, Â£200m of profit and 155,000 people working in 33 countries, including 27 countries in Africa.
Prior to this, he worked for Securicor and Jardine Matheson in Hong Kong.
Chief executive Rupert Soames said "We are delighted that David will be joining Aggreko. He brings with him a wealth of international experience and has proved his ability to build and manage very large businesses."
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