- 2019 Open European Championships (Minsk-Rsubichi, BLR) - 77th in individual / 82nd in sprint
- 2017 Open Junior European Championships (Nove Mesto, CZE): 62nd in sprint / 75th in individual
- 2017 IBU Junior Cup (Pokljuka, SLO): 30th in sprint / 20th in sprint / 8th in mixed relay
- 2017 IBU Cup (Arber, GER): 79th in individual
- 2017 IBU Cup (Martell, ITA): 83rd in sprint / 56th in sprint
- 2017 Junior World Championships (Brezno-Osrblie, SVK): 17th in relay / 41st in pursuit / 18th in sprint / 50th in individual
- 2016 Junior World Championships (Cheile-Gradistei, ITA): 12th in relay / 50th in pursuit / 48th in sprint
Siena trained with Vlad and Petra Cervenka in Grand Rapids full time in 2015 and 2016.