Henderson said Mr Finegan – who will be based in London – will commence the role on 5 January 2015, replacing outgoing head of emerging market equities Chris Palmer.
Mr Finegan will be responsible for managing $1.67 billion in global emerging market equities franchise.
He was previously a senior portfolio manager at First State Stewart – formerly known as First State Investments and part of the Colonial First State Global Asset Management stable – where he managed US$3 billion as lead manager and was co-lead on $10 billion.
Before joining First State Stewart, Mr Finegan was a geophysicist within the oil and gas industry.