Sierra was born and raised in Honolulu, Hawaii. She currently attends Orange Coast College where she plays on both the Indoor and Beach volleyball teams. In 2016 she was the starting libero for OCC. ​

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Along with being the starting libero in her 2016 season on the OCC indoor team, Sierra earned MVP and First Team All Conference. Sierra finished her 2016 season with 592 digs. Sierra holds second place at OCC for the most digs in one season. She is also 1st, 4th, and 7th for most digs in a match in her schools history. 

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In 2016 Sierra was named 5th in the CCCAA in digs and 6th for digs per set. 

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While playing on the Beach Volleyball team in 2016 at OCC Sierra earned best defensive player and 2nd Team All Conference. 

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In her 2017 season at OCC Sierra was moved to outside hitter. During this time she was named 1st in career digs standing at 917 digs. She is still currently playing on the Beach Volleyball Team at OCC in her second year. 

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Coach Sierra is currently assisting the 12U team at United.