 In 2003, Kozich moved into the senior ranks.At the 2003 World Championships, she finished 8th in the all-around, and the Ukrainian team placed 7th, qualifying for the team competition at the 2004 Olympics.The Olympic year started strongly for Kozich, with a career-highlight victory in the all-around at the 2004 European Championships, where she narrowly defeated Daniela Șofronie of Romania.