Sr. Engineer, Conjugation Development and Clinical Manufacturing



San Carlos, CA, USA
Posted on Thursday, August 31, 2023
Company Profile:
Vaxcyte, Inc. (Nasdaq: PCVX) is a vaccine innovation company engineering high-fidelity vaccines to protect humankind from the consequences of bacterial diseases. The Company is developing broad-spectrum conjugate and novel protein vaccines to prevent or treat bacterial infectious diseases. Vaxcyte’s lead candidate, VAX-24, is a 24-valent, broad-spectrum, carrier-sparing pneumococcal conjugate vaccine (PCV) being developed for the prevention of invasive pneumococcal disease (IPD). The Company is re-engineering the way highly complex immunizations are made through modern synthetic techniques, including advanced chemistry and our exclusively licensed XpressCFTM cell-free protein synthesis platform. Unlike conventional cell-based approaches, the Company’s system for producing difficult-to-make proteins and antigens is intended to accelerate its ability to efficiently create and deliver high-fidelity vaccines with enhanced immunological benefits. Vaxcyte’s pipeline also includes VAX-31, a 31-valent PCV candidate; VAX-A1, a prophylactic vaccine candidate designed to prevent Group A Strep infections; VAX-PG, a therapeutic vaccine candidate designed to slow or stop the progression of periodontal disease; and VAX-GI, a vaccine program designed to prevent Shigella. The Company is driven to eradicate or treat invasive bacterial infections, which have serious and costly health consequences when left unchecked. For more information, visit
Vaxcyte, headquartered in San Carlos, CA, went public in June 2020 and currently has a team of approximately 180 employees and anticipates continued, significant growth. Following equity offerings in October 2022 and April 2023, which generated over $1.1 billion in net proceeds, the Company’s balance sheet is further strengthened to advance its pipeline of novel vaccines, including VAX-24. These financings followed positive data readouts from Vaxcyte’s Phase 1/2 proof-of-concept study evaluating VAX-24 in adults aged 18-64 and Phase 2 study in adults 65 and older. The Company believes these results support a best-in-class potential for VAX-24, which was designed to replace the current standard-of-care in adults and children. VAX-24 is being investigated for the prevention of IPD, which can be most serious for infants, young children, older adults and those with immune deficiencies or certain chronic health conditions. Given the global impact of pneumococcal disease remains significant, the public health community continues to advocate for vaccines that can offer broader protection to prevent IPD. Vaxcyte’s PCV franchise, consisting of VAX-24 and VAX-31, is designed specifically to address this need and has the potential to deliver the broadest protection for this very serious disease. We believe that our PCVs could receive regulatory approval based on successful completion of clinical studies utilizing well-defined surrogate immune endpoints, consistent with how other PCVs have obtained regulatory approval in the past, rather than requiring clinical field efficacy studies.
The Development organization is comprised of four Process teams: Protein, Polysaccharide, Conjugate Drug Substance (Conjugation), and Drug Product. These Process Development teams are supported by Analytical Development and Formulation Development teams. Vaxcyte is looking for a Sr. Engineerwith experience in Process Characterization (PC) and Process Validation (PV) Stage 1&2 to join the Conjugation process team. The candidate will execute PC strategy for the Conjugation portion of the manufacturing process that will enable a timely and successful PPQ campaign. The candidate will also be responsible for CMO oversight.

Essential Functions

  • Help to define the scope and strategy of late-stage process development activities such as process characterization and development of scale-down models.
  • In concert with CMO, help to define the scope and strategy of PPQ activities.
  • Take the lead in scale-up activities to support manufacture of Phase 3 and Commercial scale quantities of the VAX-24 Conjugate Drug Substances.
  • In concert with CMO, identify and implement the appropriate equipment required to perform late-stage manufacturing.
  • Contribute to CMO Manufacturing oversight via document review, person in plant responsibilities, and troubleshooting when necessary.
  • Facilitate cross-functional process risk analysis using appropriate tools such as FMEA, leading to the identification of CPPs and CQAs.
  • Present/communicate data to the Conjugation Development team as well as broader CMC team.
  • Serve as a guide and mentor to junior team members.


  • PhD in Chemical/Biochemical Engineering or similar, with 2+ years of industry experience; MS with 5+ years of industry experience; or BS with 10+ years of industry experience.
  • Both practical experience with and theoretical knowledge of engineering principles involved in scaling processes from development lab to pilot / manufacturing plant.
  • Working knowledge of the requirements of GMP manufacturing, preferably with hands on GMP experience through either a Manufacturing or MSAT role.
  • Experience working with CMOs highly desired; ability to effectively transfer processes to CMO, and to oversee development and manufacturing activities performed at CMO; ability to travel to CMO (some international travel required) to perform person-in-plant oversight activities.
  • Solid understanding of the principals of DoE (Design of Experiments); practical experience with DoE software; proficient in the design and interpretation of statistically modelled experiments.
  • Experience with late-stage process development activities such as risk assessments (e.g., FMEA) and identification of CPPs and CQAs is a plus.
  • Experience writing IND sections is a plus.
  • Bioconjugate or protein purification knowledge and experience, including expertise in tangential flow filtration (TFF), process scaling and optimization, and reactor scale up is a plus.
  • Demonstrated success working in a cross-functional team environment on multiple projects; ability to work both on a team (as member and/or leader) and independently to deliver results.
  • Strong interpersonal skills, with excellent written and verbal communication skills.
  • All Vaxcyte employees require vaccination against COVID-19.
Reports to: Director, Conjugation Development and Clinical Manufacturing
Location: San Carlos, CA
The compensation package will be competitive and includes comprehensive benefits and an equity component.
Salary Range: $144,000 – $162,000
Send resumes to:
Vaxcyte, Inc.
825 Industrial Road, Suite 300
San Carlos, CA 94070
We are an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status.