Research Associate / Senior Research Associate - Oligonucleotide Synthesis & Purification

Location: San Diego, CA 

Seniority Level: Research Associate (RA) / Senior Research Associate (Sr. RA) 

Employment Type: Full-time 

About OliX Pharmaceuticals  

OliX Pharmaceuticals is a clinical-stage biotechnology company developing next-generation RNA interference (RNAi) therapeutics. Our proprietary asymmetric siRNA (asiRNA) platform enables precise, durable gene silencing and supports delivery platforms such as GalNAc-asiRNA for liver-targeted therapies and cp-asiRNA for local delivery (skin, eye, lung). Active clinical programs and global partnerships (including Eli Lilly, L’Oréal, and Hansoh Pharmaceutical) provide a strong foundation for discovery and development. By joining OliX, you’ll help shape the next generation of RNA medicines. 

Role Summary  

We are seeking a hands-on Research Associate / Senior Research Associate to support the synthesis, deprotection, purification, and analysis of chemically modified oligonucleotides that enable OliX’s RNAi pipeline. You will operate and maintain key instrumentation (e.g., HPLC/UHPLC, preparative LC, TFF, UV–Vis), document work in SOPs, batch records, and reports, and collaborate closely with RNAi chemistry, medicinal chemistry, and biology teams to advance discovery and preclinical programs. 

Key Responsibilities  

• Execute (or Help) solid-phase oligonucleotide synthesis (SPS) and downstream processing (cleavage, deprotection, desalting). 
• Purify and polish oligonucleotides using OPC, analytical and preparative HPLC/UHPLC, and UPLC; perform buffer exchange and concentration via TFF. 
• Develop and optimize purification methods and in-process controls to improve yield, purity, and throughput. 
• Perform analytical characterization (UHPLC/LC–MS, UV–Vis); compile CoAs, batch records, and data summaries. 
• Operate, maintain, and troubleshoot lab instruments; coordinate vendor service when needed. 
• Author and revise SOPs, work instructions, and technical reports; ensure data integrity and traceability. 
• Work cross-functionally with medicinal chemistry and biology teams to align materials specifications and timelines. 
• Maintain safe, compliant laboratory operations and good housekeeping (5S); participate in EHS initiatives. 
• (Sr. RA) Mentor junior team members; lead small method-development or process-improvement projects. 

Qualifications  

Required (RA):  

• B.S. in Chemistry, Biochemistry, Chemical Engineering, or related field with 0–3+ years of relevant lab experience (industry or academic core facility). 
• Hands-on experience with oligonucleotide purification (e.g., OPC, HPLC/UHPLC, preparative HPLC in anion exchange and reverse phase chromatography) and basic analytical techniques (UV–Vis, KF, etc). 
• Familiarity with solid-phase synthesis of workflows and routine instrument maintenance. 
• Strong record-keeping and communication; proven ability to meet deadlines and work effectively in a team. 

Required (Sr. RA):  

• B.S./M.S. in a related field with 3–6+ years of relevant industry experience in oligonucleotide synthesis/purification. 
• Demonstrated proficiency in method development/optimization for oligo purification and in-process analytics. 
• Experience drafting SOPs/batch records and mentoring junior staff. 

Preferred (both levels):  

• Experience with LC–MS data acquisition/interpretation for oligonucleotides. 
• Exposure to nucleoside/nucleotide building blocks or bioconjugation workflows supporting RNAi platforms. 
• Familiarity with TFF operations and scale-up considerations. 

Why Join OliX  

• Contribute directly to an innovative RNAi pipeline with active clinical programs and world-class partnerships. 
• Collaborative, growth-focused environment with cross-functional exposure. 
• Competitive compensation and benefits package (medical, dental, vision, 401(k), equity eligibility, paid holidays/year-end shutdown, stock options). 
• Base salary range of $60,000 – $90,000 (depending on experience and qualifications) 

Work Environment  

• Onsite laboratory role with routine handling of chemicals and analytical instrumentation. 
• Some lifting (up to ~50 lb) and extended periods at the bench or operating instrumentation. 
• Occasional off-hours support during critical runs. 

OliX Pharmaceuticals is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.