Mariana Vieira
About Mariana Vieira
Mariana Vieira is a Controller at Arcellx, Inc., where she manages cross-functional teams and has worked since 2021. She has a strong background in accounting and internal controls, with previous roles at EY and The Siegfried Group.
Work at Arcellx
Mariana Vieira has been serving as the Controller at Arcellx, Inc. since 2021. In this role, she manages cross-functional teams that include internal IT, tax, and valuation specialists, as well as both internal and external technical accounting advisory teams. Prior to her current position, she worked as the Assistant Controller at Arcellx from 2020 to 2021. Her experience at Arcellx reflects her capability in overseeing complex financial operations and ensuring compliance with accounting standards.
Education and Expertise
Mariana Vieira studied at Grand Valley State University, where she earned a degree in Accounting, specifically a Bacharelado em Administração. Her educational background provides a solid foundation for her extensive experience in accounting and finance. She possesses significant expertise in internal controls, particularly in accordance with the Sarbanes-Oxley Act, and has a proven track record in presenting technical and soft skills training to executives.
Background in Audit and Management
Before joining Arcellx, Mariana Vieira held several key positions in the audit sector. She worked at EY as an Audit Senior Manager from 2014 to 2019 in São Paulo, Brazil, and previously served as a Manager Audit at EY from 2007 to 2014 in McLean, Virginia. Additionally, she was an Associate Director at The Siegfried Group from 2019 to 2020 in the DC Metro Area. Her background in audit and management has equipped her with the skills necessary to lead teams effectively.
Leadership and Team Management
Mariana Vieira has extensive experience in leading teams, managing groups of 5 to 30 professionals. She delegates tasks based on individual strengths and experiences, ensuring an efficient workflow. Her leadership style emphasizes collaboration and effective communication, which is essential in managing cross-functional teams and achieving organizational goals.
Technical Communication Skills
Mariana Vieira is skilled in composing technical memos and communicating consultation matters to engagement partners and national practice. Her ability to convey complex information clearly is critical in her role, particularly when presenting to large groups of executives. This skill set enhances her effectiveness in both leadership and collaborative environments.