Associate Principal Scientist, Vector Engineering and Cell Line Development

We are seeking an Associate Principal Scientist to drive vector engineering and cell line development for lentiviral vector manufacturing. The candidate will play a critical role in building and leading a high-performing function that accelerates AstraZeneca’s emerging Cell Therapy modalities portfolio. This role focuses on designing and optimizing plasmids to improve titer, safety, product quality, and compliance, and on evaluating and implementing new cell substrates across transient transfection, stable packaging, and producer cell line systems. You will partner closely with Process Development, Analytical Development, Quality, Manufacturing, and Regulatory CMC to translate designs into scalable, phase-appropriate processes. This position is based in Gaithersburg, MD. 

Key Responsibilities 

• Plasmid Design & Optimization: Design, build, and optimize plasmids and expression cassettes (promoters, enhancers, codon usage, ITR/LTR elements, insulators, ORF engineering) to increase vector productivity and quality while reducing recombination risks and plasmid burden. 

• Safety, Quality & Compliance by Design: Engineer vectors with built-in safety controls (split genomes, self-inactivating elements), reduce RCL risk, and minimize integration-competent vector species; align designs with global regulatory expectations and internal quality standards. 

• Cell Line Strategy & Implementation: Evaluate and implement cell substrates for viral vector production, including transient transfection systems, stable packaging lines, and producer cell lines; compare productivity, product quality, cost, and scalability. 

• Stable Line Development: Generate and characterize stable clones (vector integration, copy number, expression stability, growth/production kinetics); implement selection strategies and gene/vector architectures to enhance stability and yield. 

• Producer Line Advancement: Collaborate with internal and external partners, contribute to the development of inducible/regulated producer cell lines; assess leakiness, cytotoxicity, and long-term stability; design induction strategies compatible with GMP manufacturing. 

• Characterization & Analytics Interface: Define and execute characterization plans linking design choices to critical quality attributes (genome integrity, potency, residuals, empty/full ratios); collaborate with Analytical Development on assays (qPCR/ddPCR, NGS, ELISA, infectivity/potency). 

• Tech Transfer & Documentation: Prepare technical reports, clone/construct histories, sequence maps, and development summaries; author transfer packages and support implementation at pilot and GMP sites in alignment with cGMP and data integrity expectations. 

• Cross-functional Collaboration: Working with upstream (bioreactor), downstream (purification), and analytical teams to translate designs into scalable, phase-appropriate processes. 

• Innovation & External Scouting: Evaluate next-generation vector backbones, promoters, regulatory elements, and cell engineering tools; assess new cell hosts and media/feed platforms for improved manufacturability. 

Qualifications 

• Education: PhD in Molecular Biology, Cell Biology, Bioengineering, Virology, or related field with 5–8 years of industry experience or MS with 10+ years. Title will be commensurate with qualifications and experience.