Director, Toxicology, Non-clinical Development

Company: Avidity Biosciences
Location: San Diego
Posted on: July 13, 2025

Job Description:

Job Title: Director, Toxicology, Non-clinical Development Location: San Diego, CA Position type: FLSA: Full time Exempt Department: Finance ID: Development Sciences 8100-2025-4 Profoundly Improve People’s lives by Revolutionizing the Delivery of RNA Therapeutics At Avidity Biosciences, we are passionate about the impact of every employee in realizing our vision of improving people’s lives by delivering a new class of RNA therapeutics. Avidity is revolutionizing the field of RNA with its proprietary AOCs, which are designed to combine the specificity of monoclonal antibodies with the precision of oligonucleotide therapies to address targets and diseases previously unreachable with existing RNA therapies. If you are a committed, solution-oriented thinker, join us in making a difference and become part of our growing culture that is integrated, collaborative, agile and focused on the needs of patients. Avidity Biosciences, Inc.'s mission is to profoundly improve people's lives by delivering a new class of RNA therapeutics - Antibody Oligonucleotide Conjugates (AOCs™). Utilizing its proprietary AOC platform, Avidity demonstrated the first-ever successful targeted delivery of RNA into muscle and is leading the field with clinical development programs for three rare muscle diseases: myotonic dystrophy type 1 (DM1), Duchenne muscular dystrophy (DMD) and facioscapulohumeral muscular dystrophy (FSHD). Avidity is broadening the reach of AOCs with its advancing and expanding pipeline, including programs in cardiology and immunology through internal discovery efforts and key partnerships. Avidity is headquartered in San Diego, CA. For more information about our AOC platform, clinical development pipeline, and people, please visit www.aviditybiosciences.com and engage with us on LinkedIn and X . The Opportunity Avidity is seeking an experienced non-clinical development scientist to lead a team of toxicologists that spans research and development. In this role, the successful candidate will work cross-functionally in a matrixed environment to define and implement non-clinical development strategies and successfully execute plans for programs from discovery to late-stage development. This will be a highly visible role requiring effective interaction with the Head of Toxicology, the Research Leadership Team, and leaders in Clinical Development, among others. The Director will manage a team of toxicologists and mentor, support, and contribute to their development and growth. The Director will bring early and late-stage drug development experience across multiple therapeutic areas and will be relied upon as an in-house subject matter expert (SME) in regulatory toxicology strategy, dossier writing, and health authority interactions. The successful candidate will serve as a mentor and advisor to their team and will consult on all late-stage development toxicology plans across therapeutic areas. Responsibilities will include reviewing and designing non-clinical safety studies to support clinical development and interpreting/synthesizing data appropriately. The Director will be responsible for reviewing, editing, and/or authoring all regulatory submissions and participating in health authority interactions. The successful candidate will also be expected to serve as a toxicologist on specific research and program teams. In this capacity, they will design, execute, and interpret non-clinical safety studies conducted in multiple species via collaborative partnerships with partner line program representatives (e.g., PKPD, bioanalytical, biomarkers, etc.) and will be heavily involved in regulatory submission writing. The successful candidate must have a demonstrated ability to multi-task and function effectively in a fast-paced environment, influence decision-making around scientific strategy at all levels of the company, conduct work independently, and enlist the expertise of subject matter experts when necessary to advance the conversation. In this role, it will be critical to demonstrate and ensure scientific rigor internally. The ability to comprehend and articulate complex biology to a broad audience internally and externally is essential as there will be opportunities to publish manuscripts and posters, present at scientific conferences/forums, and engage with consultants and advisors in the field, as well as the scientific community at large. What You Will Contribute Serve as a key member of multidisciplinary research and development teams representing the toxicology function to define and implement non-clinical safety evaluation strategy for novel candidate molecules. Lead the evaluation of potential safety and toxicity liabilities of biologic pathways of interest from early development (screening toxicity) through filing (Repro, Carcinogenicity, etc.). Lead the design and conduct of experiments to inform the potential translatability and relevance of non-clinical safety findings to humans. Manage non-clinical development studies in-house and at contract research organizations. Closely partner and interact cross-functionally with Avidity’s Biology, Biomarkers, and PKPD leaders in the design and interpretation of non-clinical pharmacology and efficacy studies related to the assessment of PKPD and human dose projection. Draft and review non-clinical sections of regulatory documents (IND, IMPD, CTA & IB briefing packages) including non-clinical pharmacology, pharmacokinetics, and toxicology. Participate in and lead non-clinical strategy discussions in meetings with various health authorities (FDA, EMA, PMDA, etc.) from pre-IND through pre-BLA. Represent Avidity with external vendors to manage budgets, timelines, monitoring, protocol design, reporting, and compliance. Mentor and have matrix management responsibilities for other toxicology program representatives by providing scientific guidance and by leading by example. Manage a team of toxicologists. What We Seek Minimum of 10 years of relevant experience in toxicology, pathology, pharmacology, or a related discipline, with either a PhD or MS; post-doctoral experience preferred. Candidates with an MS typically bring 15 years of experience. Excellent interpersonal skills, ability to work in a matrix environment and develop relationships with key stakeholders Excellent communication and presentation skills to efficiently inform project teams, senior management team and other key stakeholders Experience with large molecules (monoclonal antibody) and/or oligonucleotide based therapeutic modalities in drug discovery and development desired Experience as a company representative on outsourced toxicology studies managing CRO selection, contracting, budgeting, evaluation, timelines, communication, monitoring, protocol design, study execution, reporting, and regulatory compliance Experience working in a regulated environment and knowledge of GLP regulations and relevant FDA, EMA, and ICH guidelines Experience with late-stage development regulatory tox strategy Proven ability to work independently and be self-motivated What We Will Provide You: The base salary range for this role is $228,000 - $252,000. The final compensation will be commensurate with factors such as relevant experience, skill set, internal equity, and market factors. Avidity offers competitive compensation and benefits, including the opportunity for annual and spot bonuses, stock options, RSUs, and a 401(k) with an employer match. In addition, the comprehensive wellness program includes medical, dental, vision, and LTD coverage and four weeks of time off. A commitment to learning and development, including a variety of internal programming developed by and for Avidity employees, opportunities for job-specific training offered by industry, and an education reimbursement program.

Keywords: Avidity Biosciences, Norwalk , Director, Toxicology, Non-clinical Development, Science, Research & Development , San Diego, California