Dinneen has spent 36-years in the industry, most of which has been spent focusing on the emerging markets, and her managing director role at Siguler Guff saw her building out the BRIC and frontier markets business.
She previously worked for Cambridge Associates, British Telecom and the White House.
Siguler Guff managing director Ralph Jaeger has replaced Dinneen as BRICs portfolio manager according to peHUB, which was first to report the news.
The firm launched its third BRIC fundraise in 2011 and had collected about $175m as of April last year according to a filing with the US securities regulator, well short of its $1bn target.
It is unclear how much capital the fund has raised since or whether it has held a final close.
Siguler Guff gathered $893m for its second BRIC fund in 2007 and $610m for its debut BRIC vehicle two years earlier.
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