kiermayer emerged as one of germany's most prominent shooters in its olympic history. she won the silver medal in the inaugural women's double trap at the 1996 summer olympics in atlanta, united states by two points behind winner kim rhode of the united states, with a total score of 139 targets (105 in the preliminary rounds and 34 in the final) and a bonus of two from a shoot-off (against australia's deserie huddleston). kiermayer achieved a fifth-place finish each in the women's trap at the 2000 summer olympics in sydney and at the 2004 summer olympics in athens, accumulating scores of 86 and 79 clay pigeons, respectively. she also competed in the women's double trap at these olympic games, but she neither reached the final round, nor claimed an olympic medal.