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Gilead Sciences

Makes medicines for HIV, liver disease and cancer

Principal Scientist - Diagnostics, CDx

Clinical Research OperationsConfirmed live in the last 24 hours
Full-timeFoster City, CA, USAHybrid

About the Job

Requirements

  • Demonstrated ability to develop diagnostic strategies for oncology programs that align biomarker hypotheses, clinical development objectives, assay requirements, and patient-selection needs.
  • Understanding of diagnostic platforms, including immunohistochemistry (IHC), next-generation sequencing (NGS), flow cytometry, and digital pathology.
  • Knowledge of clinical study design, diagnostic regulatory requirements, and integration of diagnostic, clinical, regulatory, and commercial timelines across global development and lifecycle management.
  • Strong scientific leadership, communication, and collaboration skills, with the ability to work effectively in cross-functional teams, manage complex projects, and deliver results in a fast-paced matrix environment.
  • Detail-oriented, with strong record-keeping and organizational skills, and able to work independently as a flexible, results-oriented self-starter in a multidisciplinary environment on multiple teams simultaneously.
  • 10+ years of experience with a BA/BS, 8+ years with an MA/MS, or 2+ years with an MD or PhD in a scientific discipline or related field.

Responsibilities

  • Define CDx strategies for individual oncology programs, aligning biomarker objectives, clinical development plans, and broader portfolio diagnostic strategies in partnership with cross-functional stakeholders.
  • Develop and oversee integrated diagnostic project plans, coordinating internal teams and external partners to ensure resourcing, budgets, regulatory activities, CRO support, and operational execution are in place to meet program objectives and timelines.
  • Lead Diagnostic Sub Teams to execute diagnostic strategy from inception through regulatory approval, leveraging cross-functional expertise, third-party diagnostic partners, and central laboratories across global regions.
  • Provide diagnostic subject-matter expertise to multidisciplinary drug development teams.
  • Report to the Head of Oncology Diagnostics within the Diagnostics Group and participate as a member of relevant cross-functional drug development teams.
  • Represent the diagnostic function on multiple global program teams, ensuring diagnostic considerations are integrated into program strategy and timelines.
  • Lead Diagnostic Sub Teams and co-lead diagnostic partner teams to execute diagnostic strategy across multiple oncology programs.
  • Develop, articulate, and manage integrated diagnostic project plans in close collaboration with biomarker, regulatory, clinical development, clinical operations, quality, and external partner stakeholders.
  • Work independently in a fast-paced matrix environment to align stakeholders, marshal resources, and integrate diagnostic development into the broader drug development process.

Desired Qualifications

  • Experience in diagnostic strategy or assay development supporting oncology drug development.
  • Understanding of intellectual property, contracting terms, and provisions; a proven publication record.

About the Company

Gilead Sciences

Makes medicines for HIV, liver disease and cancer

Gilead Sciences is a biopharmaceutical company that discovers, develops and sells medicines for HIV, viral hepatitis and other liver diseases, cancer and inflammatory conditions. Its HIV business covers both treatment, led by the once-daily pill Biktarvy, and prevention, including Descovy and Yeztugo, a lenacapavir injection given twice a year. In cancer, its Kite unit makes CAR T-cell therapies from patients' own immune cells, and Trodelvy is an antibody-drug conjugate for breast cancer. Gilead earns revenue by selling its drugs to wholesalers, specialty pharmacies, hospitals and governments worldwide after regulatory approval. The company was founded in 1987 and is headquartered in Foster City, California.

Company size
10,001+
Company stage
IPO
Headquarters
Foster City, CA
Founded
1987

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