Sierra was born in Oakland, California. She graduated with a BA in Theater at UCLA, studying Directing, Musical Theater, Sound Design and Stage Management. She was an active member in the official singing group Awaken A Cappella and participated in the creation of the student-run Tiny Band Productions, bringing her directing class skills to two musicals (Assassins and The Little Shop of Horrors). She spent much of her time in John Hall’s Music Theater Workshop, where she played the role of The Witch in Into the Woods and had the pleasure of being directed by Carol Burnett in Once Upon a Mattress.

Los Angeles Theater
Sierra was seen on large stages around the Los Angeles area, including shows for Reprise! and The Fullerton Civic Light Opera Company, including Sister Sophia in The Sound of Music and Nimue in Camelot. She performed in the original cast of the popular rock opera bare at the Hudson Theater, as the Second Soprano in the critically acclaimed Master Class at the Odyssey Theater, and as diva Ellen Beach Yaw in the Los Angeles cult musical A Mulholland Christmas Carol three years in a row for Theatre of N.O.T.E. She also performed at the Utah Shakespearean Festival, returning once more to the familiar show The Little Shop of Horrors. Other credits include the original cast of Great Expectations (as Young Miss Havisham, Mrs. Joe, and Molly), Anyone Can Whistle at the Matrix Theater, and Edith in The Pirates of Penzance (Knightsbridge Theater). In 2007, Sierra joined the Definitely Dickens Holiday Carolers as a new member, and continues to perform with the New York branch.

Los Angeles Study
Sierra took private vocal lessons from Broadway alum and reknown voice teacher/director Calvin Remsberg in North Hollywood. She also studied advanced acting and on-camera techniques at the Beverly Hills Playhouse under the instruction of teachers Al Mancini, Richard Lawson, and Gary Imhoff. She also studied character voiceover via Kalmenson and Kalmenson.

Los Angeles Cabaret & Recordings
She performed as half of the cabaret duo “DeMars & Rein” with pianist/vocalist
Matthew DeMars. In 2007, Sierra produced and created her own cabaret show, Ridin’ High, directed by Calvin Remsberg. Recordings include lead roles in the original concept albums of Lilith: A Rock Opera, Great Expectations, Runway 69, Divorce: The Musical and several singing voices (and was musical director) for the rock opera movie musical Eclipse of the Heart.

New York Theater Sierra moved to New York 2008. Since arriving, she has been seen at the Tudor City Greens concert series and numerous composer showcases (including those for Hector Coris, Jay Alan Zimmerman, and Paul Farinella), and was a featured soloist at the benefit holiday concert for The New York Theatre Barn. Within a year, she experienced her New York Theater debut, Ruddigore: or the Witch's Curse at the Innovation Award-winning Theater Ten Ten. Through the use of her puppetry skills, she played both the parts of "Ruth the Bridesmaid" and “Matilda the Bridesmaid" and recieved high praise for her abilities. Sierra also performed in readings of Runway 69 at the New Dramatists organization and Strange Fruit at the Harlem School of the Arts along with members of the New York City Opera.

New York Cabaret In 2009, Sierra became a member of the Manhattan Association of Clubs and Cabaret and can often be seen at the Big Night Out and Mark Janas' The Salon open mics. By the end of 2009, she debuted Marquee Five, a new vocal group specializing in tight harmonies and committed to bringing a Broadway actors' sensibility into the Cabaret world. The group, which consists of Sierra, Adam West Hemming, Vanessa Parvin, Mick Bleyer, and Julie Reyburn, performed their first show, We Can Make It: The Songs of Kander & Ebb, in December of 2009. It was directed by Peter Napolitano and featured Mark Janas at the piano. In May of 2010, Marquee Five won the MAC Award in the Vocal Duo/Group category and Peter Napolitano was nominated in the Director category. The group continues to develop future shows and material into 2010 and beyond. On March 25, 2010, Sierra was chosen as one of two 2010 Big Gay Idol winners during the Big Gay Sing 2 concerts put on by the New York City Gay Men's Chorus. The evening featured host Scott Nevins, special guest singer Petula Clark, and an audition and performance by Sierra as a Big Gay Idol contestant. She sang "Maybe This Time" with the band and chorus during the Act II finale medley.

PuppetryA huge fan of Henson and the Muppets since childhood, Sierra has persued a love of puppeteering both on stage and on the Internet. In addition to her performance in Ruddigore, Sierra has fun with her husband and puppets Jay ThePal and Kay ThePal, creating online video content via www.thepal.us. She has also brought Kay ThePal up onto the stage with her in Jay Alan Zimmerman's composer showcase "Smokin.'"