Sierra earned her law degree at Gonzaga University School of Law, magna cum laude, where her achievements included the CALI Awards in Civil Procedure, Advanced Torts, and Consumer Law.
Before joining Sacks Tierney, Sierra served as Legislative Correspondent for economic and judicial issues for U.S. Senator Dan Sullivan, and she was an extern at the Gonzaga University Office of General Counsel, where she researched tort liability, constitutional law, and contract issues for the University.