- Caps: 2
- Birthday: 08/24/90
- Position: Wing
- Height: 5'5"
- Weight: 140
- College: Brigham Young University
- High School: Oak Ridge (CA) / ASIJ American School
- Hometown: El Dorado Hills, CA
Siebach was born in Hong Kong and lived there for 10 years before moving to California. She varsity-lettered in track and field hockey. Siebach split high school at Oak Ridge and ASIJ American School in Japan before continuing her track career at Brigham Young University. After running track for a year, she switched to rugby. Siebach represented the U.S. with the All-Americans from 2011 to 2013 and joined the Residency program at the Olympic Training Center in 2013.