BioProcess Engineer II, Downstream

Company Overview Immunity Bio  is a vertically integrated commercial stage biotechnology company developing next-generation therapies that bolster the natural immune system to defeat cancers and infectious diseases. The Company’s range of immunotherapy and cell therapy platforms, alone and together, act to drive and sustain an immune response with the goal of creating durable and safe protection against disease. Designated an FDA Breakthrough Therapy, ANKTIVA is the first FDA-approved immunotherapy for non-muscle invasive bladder cancer CIS that activates NK cells, T cells, and memory T cells for a long-duration response.

The Company is applying its science and platforms to treating cancers, including the development of potential cancer vaccines, as well as developing immunotherapies and cell therapies that we believe sharply reduce or eliminate the need for standard high-dose chemotherapy. These platforms and their associated product candidates are designed to be more effective, accessible, and easily administered than current standards of care in oncology and infectious diseases.

Why Immunity Bio?
• Immunity Bio is developing cutting-edge technology with the goal to transform the lives of patients with cancer and develop next-generation therapies and vaccines that complement, harness and amplify the immune system to defeat cancers and infectious diseases.
• Opportunity to join a publicly traded biopharmaceutical company with headquarters in Southern California.
• Work with a collaborative team with the ability to work across different areas of the company.
• Ability to join a growing company with professional development opportunities.

Position Summary The Bio Process Engineer II, Downstream role is responsible for process development, engineering, and technical support of downstream viral vector purification for the Company’s gene therapy programs. This position serves as a technical expert for crude harvest clarification, tangential flow filtration, chromatography, and sterile filtration unit operations, from clarified harvest through purified bulk drug substance. The individual will design and execute process development experiments, lead scale-up of purification processes, and use a data-driven approach to troubleshoot manufacturing issues, identify root causes, and implement improvements, working cross-functionally to deliver a robust and scalable clinical production process.

Essential Functions Serve as the process owner/subject matter expert for downstream viral vector unit operations, including crude harvest clarification, nuclease treatment, tangential flow filtration (TFF), chromatography, formulation/buffer exchange, and sterile filtration.

Design and execute experiments (including DOE) to develop, optimize, and characterize purification processes for viral vectors with the goal of improving step yield, impurity clearance (HCP, host cell DNA, introduced reagents) and product quality.

Develop and optimize filtration operations, including clarification (depth filtration, centrifugation), TFF (UF/DF with hollow-fiber and flat-sheet cassettes) and sterile (0.2 µm) filtration; perform filter sizing (e.g., Vmax/Pmax), membrane selection, and filter integrity testing.

Develop, optimize, and scale chromatography steps, including affinity capture, anion exchange polishing and full/empty separation, and other modes (e.g., CEX, HIC, SEC, mixed-mode) using resins, monoliths, and membrane adsorbers.

Perform column packing and qualification (HETP/asymmetry), establish dynamic binding capacity, resin lifetime, cleaning, and sanitization strategies, and define operating ranges for chromatography steps.

Lead scale-up of downstream processes from bench scale to pilot and cGMP manufacturing scale…