[4] She attended the Georgia Institute of Technology, where Siebner studied industrial and systems engineering,[5] despite having severe ADHD.

[4] In college, she swam for the Georgia Tech Yellow Jackets, and was named to the 2008–09, 2009–10, 2010–11, and 2011-12 Atlantic Coast Conference Academic Honor Roll.

[4] At the 2013 Maccabiah Games, she won two gold medals swimming for Israel, in the 100m butterfly and the 400m freestyle relay team, which set a new Israeli record.

[12] In June 2016, she participated in the 2016 European Aquatics Championships, finishing 16th in the 200 m butterfly with the current Israeli record, 2:11.04.

[16][17] Siebner, Amit Ivry, Shahar Menahem, and Or Tamir set an Israeli national record in the women's 4 × 100 m medley relay with a time of 4:11.67 as they won a silver medal.