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A native of Australia, Christa has served as Executive Vice President, Global Finance, and Chief Financial Officer for London-based Aon plc for the past 12 years. She oversees global financial operations for the leading global professional services firm, which has 50,000 employees operating in 120 countries. Before joining Aon, Christa was the Chief Financial Officer for Microsoft’s Platform and Services Division, the largest and most profitable division within the company.