 Sissi played for the San Jose CyberRays in the first women's professional soccer league in the United States, the Women's United Soccer Association (WUSA) all three years that the league was in existence.The team won the Founders Cup Championship in their first year together.In 2004, Sissi signed to play with the California Storm in the Women's Premier Soccer League, the highest women's professional soccer league in the United States after the WUSA ceased operations.