New York-based private equity firm Aquiline Capital Partners has hired Mark Graf as an investment professional. Graf joins the firm from Barrett Ellman Stoddard Capital Partners, where he was a partner specializing in the financial services sector.

Previously, Graf was the CFO of Cincinnati-based Fifth Third Bank, where he was a member of the executive committee and responsible for mergers and acquisitions activity, strategic planning, balance sheet management/funding and financial reporting.

"We are pleased to have Mark join Aquiline as we continue to build our team," said Jeff Greenberg, chief executive of Aquiline. "Mark brings operating and investment expertise in the areas of banking, specialty finance and transaction processing."