Scientist I, Guide RNA Chemistry, Prime Medicine

Responsibilities Design, plan, and execute complex laboratory experiments that support cross-functional research objectives. Demonstrate scientific creativity, technical excellence, and independent thinking in experimental design and execution. Synthesize chemically modified guide RNAs using MerMade 12 and/or Dr. Oligo automated synthesizers based on phosphoramidite solid-phase chemistry. Perform RNA cleavage, deprotection, desalting, purification, and sample preparation to deliver high-quality guide RNAs. Analyze crude and purified oligonucleotides using UPLC, LC-MS (Orbitrap), UV spectroscopy, and related analytical techniques to confirm identity, purity, and product quality. Troubleshoot synthesis, purification, and analytical challenges while maintaining laboratory instrumentation and ensuring operational efficiency. Drive continuous improvements in guide RNA synthesis workflows to increase throughput, robustness, reproducibility, and product quality. Collaborate closely with cross-functional teams, including Analytical Development, Biology, Formulation, and TDO, to deliver guide RNAs that meet aggressive project timelines. Maintain accurate electronic laboratory notebooks, experimental records, and data documentation. Present scientific findings at team meetings and contribute to technical discussions. Mentor and provide technical guidance to co-op students, contractors, or junior scientists as appropriate.

Qualifications PhD in Chemistry or related discipline with 0-2+ years OR MS with at 6+ years or BS with 8+ years of experience in an industry environment Hands-on experience with MerMade 12 and/or Dr. Oligo synthesizers for solid-phase oligonucleotide synthesis is strongly preferred. Demonstrated experience in phosphoramidite chemistry, RNA oligonucleotide synthesis, cleavage, deprotection, desalting, and HPLC purification. Experience producing chemically modified oligonucleotides in a high-throughput laboratory environment. Familiarity with analytical characterization techniques, including UPLC, LC-MS (Orbitrap), UV-Vis spectroscopy, and analytical data interpretation. Experience with enzymatic ligation, linker chemistry, or long RNA assembly is highly desirable but not required. Demonstrated ability to troubleshoot complex synthetic and purification challenges independently. Strong interpersonal and communication skills, with the ability to work effectively in a fast-paced, team-oriented environment and collaborate closely across cross-functional groups. Ability to mentor co-op students, contractors, or junior scientists. Highly self-motivated with a strong sense of ownership, urgency, and a "can-do" attitude. Excellent organizational, communication, and problem-solving skills with strong attention to detail. Passion for continuous learning, scientific innovation, and process improvement in a fast-paced research environment. The pay range reflects the full-time base salary range we expect to pay for this role at the time of posting. Base pay will be determined based on several factors including, but not limited to, relevant experience, skills, and education. This role is eligible for an annual short-term incentive award (e.g.,

bonus) and an annual long-term incentive award (e.g., equity). Prime Medicine offers a comprehensive Total Rewards package with robust health, financial, and wellness

benefits—including medical, dental, vision, life insurance, a 401(k) match, and equity programs—along with generous paid time off, wellness days, and company-wide recharge breaks. Our commitment to employee well-being reflects our belief that when we care for our people, we strengthen our ability to put patients first and make meaningful impact together. U.S. Pay Range $127,000 — $141,000 USD Prime Medicine is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, sexual orientation, gender identity, disability, veteran status, or any other classification protected by law.

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