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About Loyal Loyal is a clinical-stage veterinary medicine company developing longevity drugs for dogs. Our mission is to help dogs live longer, healthier lives. We're pioneering a new category of veterinary prescription drugs that proactively and preventatively target the underlying drivers of aging, delaying the onset of disease and preserving quality of life as dogs age. We've already made significant progress in our mission to develop the first FDA-approved drugs to extend canine lifespan: as of early 2026 we've completed two of three major FDA review sections for our lead program, LOY-002, and are targeting submission of the third and final section later this year. Loyal is a well-funded startup with teams of scientists, veterinarians, engineers, operators, and creatives. You'll help us continue on our path of earning FDA approval for the first lifespan extension medicine for any species, and change what's possible for the dogs we love. About the role The Senior Director of Clinical Development leads the team responsible for design, execution, and strategic direction of clinical programs across Loyal’s veterinary product portfolio. This role is responsible for driving end-to-end clinical strategy, from target product profile  to study design and regulatory-facing protocol development  through field execution, data interpretation, and evidence package generation. This is a highly cross-functional role that partners closely with R&D, Clinical Operations, Project Leadership, Regulatory (FDA-CVM),CMC, and Commercial to ensure our studies are scientifically sound, operationally feasible, and aligned with pathways to approval. You will be reporting to our VP, Clinical and Veterinary Medicine . Your daily work will include: Clinical Strategy & Program Development Own the clinical development strategy for our portfolio of veterinary drug programs, including target product profiles, pivotal pathway planning, and key endpoints aligned with CVM expectations. Build and manage detailed timelines for product development  Communicate strategy and development timelines across multiple teams within Loyal Study Design & Protocol Development Design companion animal clinical trials (pilot, field safety, and pivotal effectiveness studies) with appropriate statistical powering, endpoint justification, inclusion/exclusion parameters, and handling of operational constraints (e.g., heterogeneous populations, compliance variability). Develop protocols, investigator brochures, SAP inputs, and essential documents tailored for investigators and staff in veterinary practice settings. Work closely with statisticians on statistical design, randomization schemes, interim analyses, and data quality plans. Partner with clinical operations to execute protocols with GCP compliance and serve as medical expert throughout in-life phase. Study Execution & Medical Oversight Provide medical and scientific oversight for all clinical studies, including: Eligibility decisions Case reviews and AE/SAE reporting Protocol deviations and issue escalation Interpretation of clinical data trends during trial execution Support Clinical Operations with site engagement strategy, investigator training, and owner-facing communication frameworks. Partner with Veterinary Affairs on real-world applicability, disease models, and clinician feedback loops. Regulatory Leadership (FDA-CVM) Lead clinical components of regulatory interactions, including: Pre-Submission meetings Technical section responses Study protocol reviews with regulators Evidence summaries for FOI packages Ensure that all clinical components meet VICH, GCP, and CVM guidance standards. Cross-Functional Collaboration Work tightly with: R&D to vet new drug targets and mechanisms and interpret pre-clinical data  Regulatory to align development plans with CVM requirements