Aran Obrien

Background

About Aran Obrien

Experienced operations professional with a strong background in international tax, client documentation, and global financial services. Currently working within Citi’s International Tax Operations team, supporting cross-border tax reporting and documentation while driving improvements in risk awareness, process efficiency, and data integrity. Previously held key roles at Northern Trust, managing high-value tax reclaims for global clients—particularly in the German market—and supporting system migrations, audit readiness, and service delivery across international teams. Earlier experience includes technical support and supervisory roles in customer-facing environments, contributing to a well-rounded, solutions-driven approach to both internal operations and client servicing. Known for reliability, attention to detail, and a collaborative mindset, I’m always looking to contribute to high-performing teams and continuous improvement initiatives.