Senior MSL - West
Definium Therapeutics
August 18, 2026
Full-time
On-site
San Diego, CA
Medical Affairs
Role: Senior Medical Science Liaison (MSL) for a biotech specializing in psychiatric and neurological therapeutics, including psychedelics and CNS compounds. Objectives: serve as a scientific field expert, foster relationships with KOLs, support R&D and clinical teams, and contribute to policy and advocacy efforts. Responsibilities: engage with healthcare providers, communicate scientific data, support educational and policy initiatives, gather field insights, and assist with clinical trial activities. Qualifications: advanced scientific degree (PharmD, MD, PhD), minimum 4+ years of MSL or medical affairs experience in psychiatry/CNS, strong understanding of psychiatric disorders, and experience supporting pre-launch to launch stages. Preferred skills include policy engagement, high-level communication, and familiarity with CRM tools. HighValue: focus on psychiatry and CNS disorders, including depression, anxiety, PTSD, autism spectrum disorder, and psychedelics; roles involve stakeholder engagement, policy interaction, and clinical support; travel up to 60%. WorkSetup: Field-based role in a fast-growing biotech environment.