Dayana is a model and is signed with Elite Model Management. She has modeled for fashion designers such as Versace and Roberto Cavalli, and has traveled around the world for various modeling gigs.
Dayana was crowned Miss Venezuela 2007 on September 13, 2007. She is the second woman from the Amazonas state to win the title. She went on to compete in the Miss Universe 2008 pageant in Nha Trang, Vietnam and was crowned the winner on July 13, 2008.