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  About Parabilis Medicines   Parabilis Medicines is a clinical-stage biopharmaceutical company dedicated to creating extraordinary medicines for patients with serious diseases by unlocking biologically important targets long considered undruggable. The company has pioneered a new class of alpha-helical peptides – Helicons™ – capable of modulating intracellular proteins that have historically been beyond the reach of conventional medicines. The company’s lead investigational medicine, zolucatetide, is the first and only direct inhibitor of the β-catenin:TCF interaction, a central node in the Wnt/β-catenin pathway that has eluded drug developers for decades. Zolucatetide is being evaluated in the clinic across multiple Wnt/β-catenin-driven diseases, including desmoid tumors, familial adenomatous polyposis (FAP) and a range of other solid tumor indications. Beyond zolucatetide, Parabilis is advancing additional Helicon-based programs focused on other challenging targets where we believe our medicines could have life-altering impact. For more information, visit  www.parabilismed.com  or follow us on  LinkedIn .   What's the opportunity? Parabilis Medicines is seeking a highly motivated and driven Associate Director, Toxicology to lead nonclinical safety programs across a diverse pipeline built on Parabilis’ clinically validated Helicon™ pipeline. This is a hands-on scientific leadership role embedded in the discovery and early development organization, with accountability for advancing candidates from lead optimization through IND filing and beyond. The successful candidate will serve as the nonclinical safety lead on cross-functional project teams, working autonomously to define strategy, drive execution, influence candidate selection, and ensure robust safety assessment across our pipeline. Discovery-Stage / IND-Enabling Safety Engagement Partner with discovery teams during Pre-LO/LO to identify safety liabilities, design early safety profiling studies, and guide candidate selection through science-based risk assessment. Serve as the primary toxicology lead on project teams, driving alignment across multiple Research and Clinical functions to ensure integrated and timely IND readiness. Develop and communicate candidate-specific toxicology risk assessments and go/no-go recommendations to project teams and leadership. Apply knowledge of injectable formulations (subcutaneous, intravenous, intramuscular) to anticipate and address local tolerance, excipient toxicity, and route-of-administration-specific safety considerations. Design and oversee the complete IND-enabling nonclinical safety package, including acute and repeat-dose toxicology, safety pharmacology, genotoxicity, and local tolerance studies, across relevant species. In collaboration with project team, select appropriate species, routes of administration, doses, and study durations based on scientific rationale and regulatory expectations Author and own nonclinical sections of INDs and CTAs and support regulatory interactions Maintain awareness of evolving FDA, EMA, and ICH guidance and proactively apply updates to program strategy. CRO Management & Study Execution Select and manage CROs and specialty contract laboratories for GLP and non-GLP preclinical studies. Review study protocols, amendments, and final reports to ensure scientific rigor, GLP compliance, and alignment with regulatory expectations. Monitor study progress, interpret interim data, and make real-time scientific decisions to address unexpected findings or deviations. Oversee test article logistics, dose formulation preparation and stability, and chain-of-custody in coordination with CMC and Pharmaceutical Sciences. Scientific Leadership