Principal Clinical Scientist, ECD

POSITION SUMMARY: We are seeking a Principal Clinical Scientist to lead execution of key components of clinical development for our early cancer detection (ECD) program. This role is central to leading study execution, clinical data review, study design, and generation of scientific insights across multiple studies. The successful candidate will contribute meaningfully to clinical development strategy through hands-on study leadership, cross-functional execution, and data-driven decision-making. You will serve as a clinical science lead within cross-functional teams—partnering closely with Clinical Operations, Biostatistics, Medical Affairs, and Regulatory to drive study execution, identify risks and opportunities, and contribute to clinical development strategy through study-level leadership and scientific insight. This role is best suited for a clinical scientist who enjoys remaining closely involved in study execution, clinical data review, and cross-functional problem solving while contributing to broader clinical development discussions and strategy. Location: San Carlos, CA or Remote, USA (West Coast or Mountain time zones preferred) PRIMARY RESPONSIBILITIES: Lead Clinical Development & Study Design Lead substantial aspects of ECD clinical studies or multiple studies Drive study design, including objectives, endpoints, eligibility criteria, and schedules of assessments Author and review protocols, ICFs, CRFs, and study documents Contribute meaningfully to clinical development strategy and study-level decision-making Contribute to process improvements and development of best practices Drive Data Review & Strategic Insight Lead medical and clinical data review to ensure data quality and integrity Analyze complex datasets to identify trends, risks, and opportunities Translate data into actionable insights that inform study and program decisions Partner with safety and medical teams on signal detection and escalation Lead Cross-Functional Execution Own day-to-day clinical science responsibilities across assigned studies Drive resolution of study-level issues, risks, and operational challenges Partner closely with Clinical Operations, Medical Affairs, Regulatory, and Biostatistics to monitor study conduct, data quality, enrollment performance, and milestone delivery Make study-level decisions and recommendations in ambiguous situations with limited oversight Represent Clinical Science in internal and external forums (e.g., investigators, KOLs) Drive Study Performance & Program Value Prioritize activities across studies to ensure quality, timelines, and program impact Actively monitor study conduct, enrollment performance, protocol compliance, and clinical data quality across studies Identify operational risks early and implement corrective actions to maintain study timelines and quality Advance Scientific Communication Lead development of abstracts, presentations, and manuscripts Translate clinical and statistical results into clear scientific narratives Support internal decision-making and external evidence generation QUALIFICATIONS: Advanced degree (PhD, PharmD, MD, or equivalent; MS, MPH, RN with experience considered) 8+ years of experience in clinical research, clinical science, or related field Strong experience leading clinical studies and contributing to study design Demonstrated experience leading and executing clinical studies, including clinical data review, study-level decision making, issue management, and cross-functional coordination Preferred Qualifications: Experience in oncology, diagnostics, or early cancer detection Experience working across multiple studies or programs Track record of scientific publications and conference presentations KNOWLEDGE, SKILLS, AND ABILITIES: Ability to lead complex clinical studies or multiple workstreams independently Ability to balance scientific rigor with pragmatic decision-making in a fast-paced environment Demonstrated ownership mindset with willingness to operate outsid