As of June 2009, Dayana as Miss Universe has traveled to Indonesia, Singapore, Italy, Vatican City, Spain, France, Nicaragua, Ukraine, Czech Republic, Bahamas, Russia, El Salvador, the United Arab Emirates, Brazil, the Dominican Republic, Puerto Rico, Bolivia, Argentina, Romania, and Vietnam, in addition to numerous trips around the United States and her homecoming in Venezuela! Together with Miss Universe 1969 Gloria Diaz, Mendoza was the goodwill ambassador of Venezuela-based technology firm Smartmatic to thank the Philippines for entrusting the company the success of their 2010 presidential elections.