This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Medical Science Liaison based in the United States. This is a field-based medical affairs leadership role supporting oncology programs across a defined regional territory. You will serve as a trusted scientific partner to healthcare professionals, investigators, and external experts in Immuno-Oncology. The role combines deep clinical expertise with strategic territory planning, scientific engagement, and cross-functional collaboration. You will contribute to clinical development activities, research initiatives, and the generation and communication of scientific insights. Your work will help shape meaningful relationships with key opinion leaders and support evidence-based understanding of emerging therapies. The position offers significant autonomy in a fast-paced, collaborative environment where scientific rigor and patient impact are highly valued. With substantial field travel, you will play a visible role in connecting external oncology communities with internal medical and development teams.