Sissi won the golden boot award in the 1999 Women's World Cup in which she scored seven goals, sharing the award with China's Sun Wen. She is presently head coach for the Las Positas College Women's Soccer team in Livermore, California.
On 29 September 2008, Sissi was announced as the new assistant coach for the Bay AreaWomen's Professional Soccer team, ultimately known as FC Gold Pride. On June 11, 2009, it was announced that Sissi was joining the roster of the FC Gold Pride, making her the oldest player in the Women's Professional Soccer league.