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Senior Scientist -Oligonucleotide Process Development

Job in San Diego, San Diego County, California, 92189, USA
Listing for: Sinopep-Allsino Biopharmaceutical Co., Ltd.
Full Time position
Listed on 2026-01-24
Job specializations:
  • Research/Development
    Research Scientist, Biotechnology, Drug Discovery
Salary/Wage Range or Industry Benchmark: 125000 - 150000 USD Yearly USD 125000.00 150000.00 YEAR
Job Description & How to Apply Below

Job Title:

Senior Scientist - Oligonucleotide Process Research & Development (PhD)

About Us

Sinopepis a leading China-based CDMO partner focused on accelerating the discovery, development, and manufacturing of innovative oligonucleotide therapeutics. We provide integrated solutions from preclinical to commercial supply, leveraging state-of-the-art facilities and deep scientific expertise. Join our dynamic team and contribute to advancing the next generation of genetic medicines for global partners.

Position Summary

We are seeking a highly motivated and creative PhD Scientist to join our expanding Oligonucleotide Process R&D team. This role is pivotal in designing, developing, optimizing, and scaling robust, cost-effective, and sustainable chemical processes for the synthesis and purification of therapeutic oligonucleotides (ASOs, siRNA, aptamers, etc.) for our global CDMO clients. The successful candidate will lead projects from early-stage feasibility through process characterization and technology transfer to GMP manufacturing.

Key Responsibilities
  • Lead Oligonucleotide Process Development:
    Design, plan, execute, and analyze experiments to develop and optimize solid-phase (SPOS) and/or solution-phase synthesis processes for complex oligonucleotides (including modified nucleotides, conjugates).
  • Purification & Analytical Focus:
    Develop, optimize, and scale chromatographic purification strategies (e.g., RP-HPLC, IE-HPLC, AEX) for crude oligonucleotides. Integrate analytical methods (HPLC, UPLC, MS, CE, UV, NMR) for process monitoring, impurity characterization, and control strategy development.
  • Scale-Up & Technology Transfer:
    Lead the scale-up of developed processes from laboratory to pilot plant and ultimately to GMP manufacturing scales. Author robust technical transfer documents and provide hands-on support during transfer activities.
  • Process Characterization & Validation:
    Contribute to or lead process characterization studies (e.g., identification of Critical Process Parameters - CPPs) to establish proven acceptable ranges (PARs) and support process validation (PPQ) activities.
  • Innovation & Problem Solving:
    Proactively identify process bottlenecks, inefficiencies, or quality issues and develop innovative, scientifically sound solutions. Explore novel technologies and methodologies to enhance synthesis, purification, or analytical capabilities.
  • Data Analysis & Documentation:
    Rigorously analyze experimental data, draw sound scientific conclusions, and maintain accurate, detailed laboratory notebooks and electronic records. Prepare high-quality technical reports, development reports, and sections of regulatory submissions (e.g., CMC modules).
  • Cross-Functional Collaboration:

    Work effectively with Analytical Development, Manufacturing, Project Management, Quality Assurance (QA), and Quality Control (QC) teams to ensure seamless project execution and alignment with client timelines and quality standards.
  • External Communication:
    Present scientific results clearly and concisely to internal stakeholders and external clients. Participate in technical discussions and project meetings.
  • Mentorship (Potential):
    Provide technical guidance and mentorship to junior scientists and research associates.
  • Required Qualifications & Experience
  • Education: PhD in Organic Chemistry, Medicinal Chemistry, Biochemistry, Chemical Engineering, or a closely related field.
  • Experience: 0-5 years of relevant industrial experience (post-PhD) in oligonucleotide process R&D within a pharmaceutical, biotech, or CDMO setting. Exceptional new PhD graduates with a strong focus on oligonucleotide synthesis/chemistry will be considered.
  • Deep understanding of oligonucleotide chemistry (phosphoramidite synthesis, protecting groups, coupling efficiency, side reactions).
  • Proven hands-on experience in developing and optimizing oligonucleotide synthesis processes (SPOS required; solution-phase a plus).
  • Extensive experience with oligonucleotide purification techniques, particularly preparative HPLC (RP, IE, AEX).
  • Strong proficiency in analytical techniques for oligonucleotide characterization (HPLC/UPLC, MS, CE, UV-Vis, NMR interpretation).
  • Experience with process optimization, troubleshooting, and scale-up principles.
  • How to Apply

    Interested candidates should submit their CV/resume, a cover letter detailing their relevant experience and research interests to

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    Position Requirements
    10+ Years work experience
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