Isabella joined NASDAQ International as Senior Managing Director in 2001, responsible for business development and account management of The NASDAQ Stock Market in Western Europe. Following NASDAQ's acquisition of OMX, Isabella was promoted to Vice President, responsible for the listing business of NASDAQ OMX within Europe.

Prior to that, Isabella gained extensive business development experience within the telecommunications industry, heading business units at British Telecommunications Plc and at Deutsche Telekom AG, and within the Services Industry. Isabella graduated from Munich University with an Honours Degree with distinction in Business Management.