After switching to synchronized swimming from race swimming, Killman was a member of the teams that won silver medals in the duet and team competitions at the 2011 Pan American Games in Guadalajara, Mexico and 2015 Pan American Games in Toronto, Ontario, Canada.

[1] She is an enrolled member of the Citizen Potawatomi Nation, a federally recognized tribe based in Oklahoma.

[2] After competing in youth competitions through the 2000s, in 2007 Killman was named to her first National Team at the mere age of 16.

[1] Shortly before the 2011 Pan American Games in Guadalajara, Mexico, she was partnered with Mariya Koroleva to compete as a duet.

[3] Following the 2012 Olympics, Killman joined the Lindenwood University synchronized swimming team,[4] one of six collegiate varsity synchronized programs in the United States[5] and is currently a four times USA synchro athlete of the year (2010, 2011, 2012, 2014); she holds five US senior national solo titles (2010, 2013, 2014, 2015, 2016) and three US collegiate national solo titles (2013, 2014, 2015) with the 4th consecutive title not claimed due to not competing at the collegiate level for her senior year.