The Sr Director, Country & Site Operations (CSO), European Markets, is accountable for leadership and performance of country and site operations across assigned European markets, supporting Biogen clinical trials across all phases of development and therapeutic areas. This role provides strategic and operational leadership to regionally based clinical country leaders and Clinical Country & Site Leads (CCSLs), ensuring strong country delivery, site performance, and sponsor oversight. The role leads through a management team of Directors, Associate Directors, and Senior Managers and is accountable for country‑level execution, issue resolution, and continuous performance improvement. The CCSL field‑based is a core pillar of the role, with accountability for maintaining strong investigator and site relationships, driving site intelligence, and reinforcing Biogen’s position as a sponsor of choice through scientific and operational engagement directly tied to clinical trials. Additiona...