The Discovery Research group is seeking a highly skilled and motivated Senior Scientist I/II to join the RNA Platform team in Worcester, MA. The ideal candidate combines deep technical expertise in mRNA biology and manufacturing with the creativity and initiative to independently lead platform innovation projects from concept through experimental execution with the goal of advancing next-generation RNA therapeutics. You will play a pivotal role in translating scientific concepts into tangible research progress while contributing to a collaborative and fast-paced research environment. Responsibilities: • Lead hands-on production of high-quality mRNA, including in vitro transcription (IVT) and purification workflows. • Design and execute experiments to develop and optimize strategies for sustained payload expression in target cell types, leveraging a strong foundation in molecular biology. • Drive payload innovation by identifying, evaluating, and implementing cutting-edge approaches to improve payload performance, stability, and therapeutic applicability. • Collaborate closely with molecular biology, formulation, and analytical teams to ensure production timelines are met. • Collaborate cross-functionally with internal teams to advance integrated project goals. • May involve supervision and mentorship of a small team of 1-2 research scientists, providing scientific guidance, experimental oversight, and professional development support. • Communicate research findings clearly through internal presentations, scientific reports, and contributions to publications and patent disclosures. • Maintain meticulous laboratory records and ensure compliance with relevant safety, quality, and regulatory standards. • Stay current with emerging trends and technologies in mRNA design, production, and LNP delivery to inform platform strategy. Qualifications Required: • Senior Scientist I: Bachelor's Degree and typically 10 years of experience, Master's Degree and typically 8 years of experience, PhD and no experience. • Senior Scientist II: Bachelor's Degree and typically 12 years of experience, Master's Degree and typically 10 years of experience, PhD and typically 4 years of experience. • Hands-on experience with mRNA production techniques such as in vitro transcription and purification methods (e.g., chromatography, filtration). • Experience with analytical characterization of mRNA (e.g., electrophoresis, HPLC, RT-qPCR, spectrophotometry). • Deep expertise in payload design principles, production methods, and functional testing assays. • Proven ability to develop and optimize methods for sustained gene expression in mammalian cell systems. • Demonstrated ability to work independently to design and execute experiments, troubleshoot problems, and drive projects to completion. • Excellent scientific communication skills, both written and verbal. • Excellent organizational skills and attention to detail in experimental design, execution, and documentation. Preferred: • Hands-on experience with multiple payload modalities, such as: mRNA, circRNA, ssDNA, or analogous platforms. • Experience with lipid nanoparticle (LNP) or other delivery systems for nucleic acid payloads. • Track record of publications, patents, or presentations in relevant fields. Additional Information Applicable only to applicants applying to a position in any location with pay disclosure requirements under state or local law: • The compensation range described below is the range of possible base pay compensation that the Company believes in good faith it will pay for this role at the time of thisposting based on the job grade for this position. Individual compensation paid within this range will depend on many factors including geographic location,and we may ultimately pay more or less than the posted range. This range may be modified in the future. • We offer a comprehensive package of benefits including paid time off (vacation, holidays, sick), medical/dental/vision insurance and 401(k) to eligible employees. • This job is eligible to participate in our long-term incentive programs. Note: No amount of pay is considered to be wages or compensation until such amount is earned, vested, and determinable. The amount and availability of any bonus, commission,incentive, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole and absolute discretion unless anduntil paid and may be modified at the Company's sole and absolute discretion, consistent with applicable law.