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About Ossium Ossium’s mission is to improve the health, vitality, and longevity of human beings through bioengineering. We develop, manufacture, and bank cell therapy products that apply the power of stem cell science to revolutionize treatment for patients with blood, immune, and orthopedic diseases.  At Ossium, we empower our employees, maintain the highest standards of operational excellence, and are a force for good. About the Job We are hiring a Director, Scientific Affairs who brings both scientific depth and a genuine passion for connecting people, evidence, and ideas. In this role, you'll be at the center of our clinical and commercial efforts; helping translate complex science into clear, compelling stories that move the field forward. You'll partner closely with teams across Ossium to shape medical and scientific strategy, supporting the commercial launch of our novel cryopreserved bone marrow, and leading medical education and data communication work that actually changes how clinicians think about treating patients. Whether you're collaborating with individual clinical sites on evidence-generation projects or working alongside the commercial team to bring our flagship product to patients in need, you'll be the bridge between science and impact. This is an excellent role for someone who thrives at the intersection of rigor and relationship-building; the ideal candidate is someone who can walk into a room of scientists, surgeons, or sales leads and speak everyone's language.  This role reports directly to the Chief Medical Officer. Required Qualifications MD/PhD in a life science/biomedical discipline with strong clinical experience 5+ years of industry experience  Proven ability to collaborate, partner, and influence across multiple functions and levels of leadership Demonstrated experience with manuscript and abstract writing and post hoc data analyses Experience working with MSLs and providing medical/scientific support to commercial teams Proven agility and adaptability in a fast-paced, results-driven startup environment Excellent written, verbal, and presentation communication skills Understanding of biostatistical concepts to analyze clinical trial data Comfortable with travel from 15% - 30% This position is based in our San Francisco office; we maintain a hybrid schedule of Monday - Thursday in the office, with Friday as a remote work day Qualified candidates must be legally authorized to be employed in the United States; Ossium is unable to provide sponsorship for employment visa status (eg, H-1B or TN status) for this position, either now or in the future Preferred Qualifications Scientific or clinical expertise in hematologic malignancies, hematopoietic cell transplantation (HCT), or cell therapy Experience supporting product launch  Background in rare disease or a specialized therapeutic indication (e.g., bone marrow transplantation) Experience in clinical development or protocol support Key Responsibilities Drive scientific communications internally and externally, including data dissemination, educational initiatives, and guideline/value-proposition development Assist with strategic publication planning and writing/preparing manuscripts, abstracts, and presentations Collaborate closely with Medical Science Liaisons (MSLs) to generate, synthesize, and communicate scientific insights from field interactions Assist with initiating and maintaining relationships with transplant MDs and PIs Lead evidence-generation initiatives (clinical, secondary analyses, real-world evidence) to enhance understanding of therapeutic benefit and value Serve as medical reviewer on the Promotional Review Committee and ensure scientific accuracy and compliance of promotional materials Support congress planning and KOL engagement efforts in partnership with the Medical Science Liaison team Provide strategic medical and