Principal Engineer, Lentivirus Downstream Process Development Employer Legend Biotech Location Somerset, New Jersey Salary $146410 - $192164 Start date Jul 31, 2026 View more categories View less categories Discipline Engineering , Manufacturing & Production , Process Required Education Masters Degree/MBA Position Type Full time Apply now Save job Click to add the job to your shortlist You need to sign in or create an account to save a job. Send job Job Details Company Job Details Legend Biotech is a global biotechnology company dedicated to treating, and one day curing, life-threatening diseases. Headquartered in Somerset, New Jersey, we are developing advanced cell therapies across a diverse array of technology platforms, including autologous and allogenic chimeric antigen receptor T-cell, T-cell receptor (TCR-T), and natural killer (NK) cell-based immunotherapy. From our three R D sites around the world, we apply these innovative technologies to pursue the discovery of safe, efficacious and cutting-edge therapeutics for patients worldwide. Legend Biotech entered into a global collaboration agreement with Janssen, one of the pharmaceutical companies of Johnson & Johnson, to jointly develop and commercialize ciltacabtagene autolecuel (cilta-cel). Our strategic partnership is designed to combine the strengths and expertise of both companies to advance the promise of an immunotherapy in the treatment of multiple myeloma. Legend Biotech is seeking a Principal Engineer, Lentivirus Downstream Process Development as part of the Technical Development team based in Somerset, NJ. Role Overview The Principal Engineer, Lentivirus Downstream Process Development, will be a key technical leader responsible for designing, optimizing, and scaling purification processes for lentiviral vectors (LVV) within our innovative pipeline. This role focuses on delivering high-quality vector products to support LVV generation and other advanced cell therapy programs. The successful candidate will drive scientific excellence in downstream processing (DSP)—including clarification, chromatography, TFF, sterile filtration and fill/finish—ensuring processes are robust, scalable, and phase-appropriate for GMP manufacturing. This position demands a blend of hands-on technical mastery and strategic thinking to accelerate timelines while maintaining a patient-focused approach. Key Responsibilities Design and execute highly efficient purification strategies for lentiviral vectors, specifically optimized for CAR-T applications. Direct the development and optimization of downstream processes including and not limited to: clarification (depth filtration, centrifugation), chromatography (AEX, SEC, HIC), and Tangential Flow Filtration (TFF) for concentration and diafiltration. Provide hands-on training as needed. Direct the translation of bench-scale processes to GMP manufacturing, ensuring seamless technology transfer and providing troubleshooting support during clinical production runs. Lead the execution of study protocols to define operating parameters and performance limits; implement state-of-the-art knowledge management for DSP data. Communicate the potential for issues and delays along with solutions and mitigation approaches. In collaboration with the Senior Leaders, CMC Project Manager, Project Leader, and other technical leads identify project acceleration opportunities. Leverage advanced science and technology to maximize vector recovery, purity, and potency, identifying creative solutions to define unknowns in the viral vector field. Guide a team of scientists in the execution of project-specific activities, fostering a culture of transparency, scientific rigor, and continuous improvement. Author and serve as a primary reviewer for technical documents, including development reports, SOPs, and CMC sections for regulatory submissions (IND/IMPD). Work closely with Upstream Process Development and Analytical Development teams to ensure integrated and holistic process outcomes. Tech transfer process to/from other Legend sites or CDMOs. Resolve conflict and proactively identify/address performance issues. Ensure compliance with regulatory requirements. Requirements Advanced degree (PhD preferred, or MS) in Chemical Engineering, Biomedical Engineering, bioprocessing engineering or a related field. 8+ years (PhD) or 10+ years (MS) of experience in process development or manufacturing within a biotech or pharmaceutical setting. Strong engineering knowledge of the principles of scaledown model and the interaction of biomolecules, materials and machinery. Deep technical hands-on experience in purification, chromatography, and TFF specifically for viral vectors (Lentivirus preferred). Strong understanding of GMP manufacturing requirements and CMC strategies for early-phase clinical trials. Deep knowledge and hands-on experiences in cell and lentiviral vector technologies within the current emerging field. Ability to implement closed-system processes and maximize cost effectiveness. Excellent leadership, emotional intelligence, and communication skills; ability to maintain composure and strategic focus during challenging development timelines. Creative, strategic thinking. Strong troubleshooting skills. Preferred experience in developing vector processes tailored for in vivo CAR-T generation and systemic delivery. Preferred experience in handling large scale(>50L) purification process. #Li-JR1 #Li-Onsite The base pay range below is what Legend Biotech USA Inc. reasonably expects to offer at the time of posting. Actual compensation may vary based on experience, skills, qualifications, and geographic location. The company reserves the right to modify this range as needed and in accordance with applicable laws.

Other Types of Pay:

Performance-based bonus and/or equity is available to employees in eligible roles.

Benefits and Paid Time Off:

Medical, dental, and vision insurance as well as a 401(k) retirement plan with a company match that vests fully on day one. We offer eight (8) weeks of paid parental leave after just three (3) months of employment, and a paid time off policy that includes vacation time, personal time, sick time, floating holidays, and eleven (11) company holidays. Additional voluntary benefits include flexible spending and health savings accounts, life and AD&D insurance, short- and long-term disability coverage, legal assistance, and supplemental plans such as pet, critical illness, accident, and hospital indemnity insurance. We also provide voluntary commuter benefits, family planning and care resources, well-being initiatives, and peer-to-peer recognition programs; demonstrating our ongoing commitment to building a culture where our people feel empowered, supported, and inspired to do their best work. Pay Range (Base Pay): $146,410 - $192,164 USD Please note: These benefits are offered exclusively to permanent full-time employees. Contractors are not eligible for benefits through Legend Biotech. Work Authorization & Employment Eligibility Applicants must be authorized to work in the United States. As part of our commitment to maintaining a lawful workforce and ensuring compliance with federal employment regulations, we participate in the E-Verify program. If you are selected for employment, you will be required to complete the Form I-9 process, and your employment eligibility will be verified through E-Verify in accordance with applicable federal law. We are committed to providing a fair, transparent, and welcoming hiring experience for all candidates. EEO Statement It is the policy of Legend Biotech to provide equal employment opportunities without regard to actual or perceived race, color, creed, religion, national origin, ancestry, citizenship status, age, sex or gender (including pregnancy, childbirth, related medical conditions and lactation), gender identity or gender expression (including transgender status), sexual orientation, marital status, military service and veteran status, disability, genetic information, or any other protected characteristic under applicable federal, state or local laws or ordinances. Employment is at-will and may be terminated at any time with or without cause or notice by the employee or the company. For information related to our privacy notice, please review: Legend Biotech Privacy Notice . Company Legend Biotech was founded as an early-stage cell therapy company in 2014. The company was the brainchild of visionary scientists who recognized that antibody-based therapeutics could potentially treat disease and possessed the backgrounds in immunology and gene editing to take the leap. For two years, Legend Biotech, then known as the "Legend Project," operated in a room the size of a freight elevator, with the goal of creating a cell therapy for multiple myeloma, a hematological cancer that often relapses and can become refractory. The team produced nanobodies for single-domain antibody drugs and ultimately extended the half-life of the nanobodies with proprietary technologies. In 2015, Legend's scientists focused on research for chimeric antigen-receptor T-cells (CAR-T) targeting the BCMA protein, making the biotech one of the first companies in the world to engineer CAR-T cells for the BCMA protein. In 2016, investigator-initiated trials began in China. In 2017, data from the trials were presented at the American Society for Clinical Oncology (ASCO), which led to a partnership with biopharmaceutical company Janssen Biotech, Inc. to co-develop the anti-BCMA CAR-T, ciltacabtagene autoleucel (cilta-cel). Applications seeking approval of cilta-cel for the treatment of patients with RRMM are currently under regulatory review by several health authorities around the world.

CARVYKTI

™ (ciltacabtagene autoleucel) was approved by the U.S. Food and Drug Administration in February 2022 and received conditional marketing approval from the European Medicines Agency in May 2022. Today Legend Biotech is a global, commercial-stage company driven by a passion for patients. We continue to build our pipeline of cell therapy platforms, which includes CAR-T, CAR-NK, CAR-γδ T and non-gene-editing CAR technologies. Our goal is to bring hope and opportunity to patients and their families by continuing to explore unique technologies. Company info Location Somerset New Jersey US Share this job Facebook Twitter LinkedIn Apply now Send job Apply now Save job Click to add the job to your shortlist You need to sign in or create an account to save a job. Get job alerts Create a job alert and receive personalized job recommendations straight to your inbox. Create alert Similar jobs Process Development Principal Scientist Thousand Oaks, California Principal Peptide Process Engineer, Research Scientist II North Chicago, IL Senior Associate Manufacturing Thousand Oaks, California