• Identify (KOLs) and the treatment landscape nationally including high prevalence areas of HDV management and treatment. • Build peer-level relationships with KOLs, investigators, academic thought leaders in hepatology, infectious disease and other appropriate specialties while maintaining their trust as scientific partner/collaborator. • Serve as a senior field-based MSL, conducting compliant, fair-balanced, non-promotional scientific exchange with key opinion leaders (KOLs), investigators, and other healthcare stakeholders in support of the Hepatitis D (HDV) program. • Develop and maintain deep expertise in HDV disease state, mechanism of action, clinical data, and emerging literature. • Identify unmet medical needs, emerging trends, and actionable insights; communicate these insights internally to the Global Medical Affairs Team (GMAT) to inform strategy. • Support medical education activities, advisory boards, scientific congresses, and investigator-initiated research (as appropriate). • Act as a player/coach, balancing individual field responsibilities with leadership and mentorship of MSLs as the organization expands. • Support the expansion of the MSL organization including hiring, onboarding, training, and field readiness. • Coach MSLs on scientific communication, stakeholder engagement, territory planning, and insight generation. • Establish performance expectations, provide ongoing feedback, and support professional development. • Help define field medical processes, best practices, and success metrics. • Foster a culture of scientific excellence, collaboration, accountability, and compliance. • Contribute to the development and execution of field medical strategy aligned with Mirum’s Medical Affairs objectives. • Support Medical Affairs initiatives across clinical development, launch readiness, and lifecycle management. • Work compliantly with cross-functional partners to support the overall brand strategy through effective communication of scientific information. • Provide leadership input into launch planning, resourcing, and long-term Medical Affairs organizational design. • Ensure all activities are conducted in compliance with company policies, SOPs, and applicable regulations.