Born in Miami, Florida, Kosik attended Nova High School. After high school Kosik received her Bachelor of Arts degrees in Broadcast Journalism and Political Science from The American University in Washington, DC. In addition, Kosik received a Scripps Howard New Media Fellowship from Columbia University in 2001. She also received a 1999 Florida AP Award for Best Spot News and was a 1993 Fellow from the International Radio and Television Society. She is based at the CNN bureau in New York.