Euronet Worldwide Inc. announced the appointment of Mark R. Callegari to its Board of Directors, along with positions on the Board's Nominating and Corporate Governance and Compensation Committees. Mr. Callegari is the Founder and Chief Executive Officer of Callegenix, LLC. Along with Callegenix, Mr. Callegari also founded LightWild, LLC, Tidestone Technologies Inc. and Visual Components Inc.