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About Sail
Sail Biomedicines is pioneering the integrative design and deployment of fully programmable medicines to transform patient care. Sail’s platform combines first-in-class programmable circular RNA technology (Endless RNA™ or eRNA), and an industry-leading platform of programmable nanoparticles, utilizing natural components, to unlock comprehensive programming of medicines for the first time. By leveraging cutting-edge eRNA and nanoparticle deployment technology, Sail is also making unparalleled use of AI techniques to identify and design fully programmable medicines that are potent, targeted, versatile, and tunable. Sail was founded by Flagship Pioneering.
The Role
The Sr Director, Delivery will be responsible for advancing Sail’s targeted nanoparticle delivery platform, with a particular focus on lipid nanoparticle (LNP) technologies for cell-specific delivery of RNA therapeutics. This role will lead the strategy and execution of delivery innovation from early discovery through preclinical development, enabling robust, scalable, and translatable delivery solutions across Sail’s pipeline.
This individual will bring deep technical expertise in lipid nanoparticle design and formulation, as well as demonstrated experience in targeted delivery approaches, including ligand-mediated targeting, bioconjugation, and receptor-specific delivery strategies. They will play a central role in shaping Sail’s delivery capabilities, expanding tissue and cell-type reach, and unlocking new therapeutic applications.
The Sr Director will operate at the intersection of Platform, Programs and Technical Development, working cross-functionally to translate delivery innovations into high-impact programs. They will lead a team of scientists and serve as a key thought partner to senior leadership on delivery strategy, platform investments, portfolio prioritization, and technical risk.
This role is accountable for the foundational and Delivery capability at Sail, ensuring that targeted nanoparticle systems are not only innovative but also translatable and scalable, enabling continued pipeline progression to development candidates.
Responsibilities
Delivery Leadership and Strategy
Cross-Functional & Operational Leadership
Qualifications
Salary Range: $235,000 - $290,000
Sail Biomedicines is an Equal Opportunity Employer. Sail does not discriminate based on race, religion, color, sex, gender identity, sexual orientation, age, national origin, veteran status, or any other status protected under federal, state, or local law.
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About Sail:
Sail Biomedicines is pioneering the integrative design and deployment of fully programmable medicines to transform patient care. Sail’s platform combines first-in-class programmable circular RNA technology (Endless RNA™ or eRNA), and an industry-leading platform of programmable nanoparticles, utilizing natural components, to unlock comprehensive programming of medicines for the first time. By leveraging cutting-edge eRNA and nanoparticle deployment technology, Sail is also making unparalleled use of AI techniques to identify and design fully programmable medicines that are potent, targeted, versatile, and tunable. Sail was founded by Flagship Pioneering.
The Role:
Sail Biomedicines is seeking a motivated Senior Research Associate / Scientist I to join our Vaccines, Immunoassay & Pharmacology team. This role will develop, optimize, and execute bioassays to characterize biological activity, mechanism, and immune responses for candidates enabled by Sail’s eRNA™ delivery platform, supporting in vivo PK/PD, toxicology, and translational decision-making.
This is a lab-based, onsite role with substantial hands-on experimental work, collaborative problem-solving, and close partnership with cross-functional teams. The ideal candidate brings strong experience in mammalian cell culture, flow cytometry, serology/immunoassays (e.g., ELISA/MSD), qPCR, and excellent scientific documentation. You will generate high-quality data, troubleshoot assays, and contribute to advancing Sail’s platform and pipeline.
Responsibilities:
Bioassay Development & Execution
Sample Operations & Study Support
Data, Documentation & Collaboration
Required Qualifications:
Preferred Qualifications:
Salary Range: $80,000 - $115,000
Sail Biomedicines is an Equal Opportunity Employer. Sail does not discriminate based on race, religion, color, sex, gender identity, sexual orientation, age, national origin, veteran status, or any other status protected under federal, state, or local law.
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