Senior Medical Science Liaison (Oncology)

West Leland Group is partnering with a science-driven life sciences organization seeking an experienced Senior Medical Science Liaison to join its growing U.S. Medical Affairs organization. This field-based role will serve as a key scientific partner to physicians, investigators, and academic institutions across the Western U.S. The Senior MSL will work closely with Medical Affairs and Clinical Development to support scientific exchange, KOL development, ongoing clinical research, and evidence generation across oncology and other complex disease areas. The successful candidate will bring deep field medical experience, strong scientific credibility, and a track record of developing meaningful relationships with key external experts. Location This is a field-based role supporting the Western U.S. and candidates based in Southern California are strongly preferred, with consideration given to other strategic locations across the region. What You'll Do Build and expand trusted scientific relationships with KOLs, investigators, healthcare professionals, and leading academic institutions. Lead balanced, evidence-based scientific exchange and communicate complex clinical data with credibility. Support clinical research through investigator engagement, trial education, site collaboration, and identification of potential research opportunities. Gather meaningful field insights and communicate emerging trends, unmet needs, and key observations internally. Represent the organization at scientific congresses, advisory boards, investigator meetings, and educational programs. Collaborate closely with Medical Affairs, Clinical Development, Clinical Operations, and other internal stakeholders. Independently develop and execute territory strategy across a geographically diverse, multi-state region. Required Qualifications Advanced degree (PharmD, PhD, MD, NP, PA, or equivalent). 5+ years of Medical Science Liaison experience, including significant experience within oncology. Experience in solid tumors, hematologic malignancies, or cell therapy is highly relevant. Demonstrated success developing scientific relationships with KOLs, investigators, and academic medical centers. Experience supporting clinical trials and investigator engagement. Strong ability to interpret and communicate complex scientific and clinical information. Proven success independently managing a large, field-based territory. Excellent communication, organizational, and relationship-building skills. Why This Opportunity Join a growing U.S. Medical Affairs organization at an earlier stage of its field team expansion. Serve as the first dedicated MSL in the Western U.S., helping establish and grow the organization's scientific presence across the region. Take on a highly visible role with the opportunity to shape territory strategy, build key external relationships, and contribute to ongoing clinical and scientific initiatives. About West Leland Group West Leland Group is a boutique search firm specializing in Medical Affairs, Quality, and Regulatory recruiting across the biotechnology, pharmaceutical, and medical device industries. We partner with innovative organizations to build high-performing, scientifically grounded teams. Thoughtful Search. Purposeful Hiring. This search is being managed by West Leland Group on behalf of our client. Qualified applicants will be considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status. This is a direct-hire opportunity with a client organization offering competitive compensation and benefits. #J-18808-Ljbffr West Leland Group