Arminda Phillips mainly competes in senior races in the 2000s and has won several US championships here. Sometimes, however, it also starts in the performance area. In the 2008/09 season of the Biathlon NorAm Cup she won a pursuit race in Whistler in the highest continental racing series, in which she was the only starter. The day before, she was disqualified in the sprint race, which she missed a one-two. At the 2010 US Championships in the summer biathlon in Tukwila , she won the bronze medal in the cross-country sprint race and in the mass start behind Sibylle Wilbert and Carol Stuhley , in the pursuit race she was only beaten by Wilbert. She also came third in the overall ranking of the three races.