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Salary
$169k – $219k per year
Location
In office (Foster City)
Seniority
Senior · 8+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 30, 2026. First seen by Alion on Sep 25, 2026. Gilead Sciences scores A on the Alion truth index.

Overview
Company
Impact
Profile match
Gilead Sciences is a American biopharmaceutical company that discovers, develops, and commercializes innovative medicines for life-threatening diseases. Founded in 1987 and headquartered in Foster City, California, the company is globally recognized for transforming HIV treatment and advancing curative therapies for hepatitis C. Listed on the NASDAQ, it also focuses on developing targeted therapies in oncology, cell therapy, and inflammatory conditions worldwide.

At Gilead, we’re creating a healthier world for all people. For more than 35 years, we’ve tackled diseases such as HIV, viral hepatitis, COVID-19 and cancer - working relentlessly to develop therapies that help improve lives and to ensure access to these therapies across the globe. We continue to fight against the world’s biggest health challenges, and our mission requires collaboration, determination and a relentless drive to make a difference.

Every member of Gilead’s team plays a critical role in the discovery and development of life-changing scientific innovations. Our employees are our greatest asset as we work to achieve our bold ambitions, and we’re looking for the next wave of passionate and ambitious people ready to make a direct impact.

We believe every employee deserves a great leader. People Leaders are the cornerstone to the employee experience at Gilead and Kite. As a people leader now or in the future, you are the key driver in evolving our culture and creating an environment where every employee feels included, developed and empowered to fulfil their aspirations. Join Gilead and help create possible, together.

Job Description

The Senior Scientist, Purification Process Development (Pivotal & Commercial) role will be responsible for leading aspects of purification development including commercial process development and process characterization for multiple biologics programs during pivotal phases (phases II/III and post-launch). In addition, this role is also expected to lead/support technology transfer, participate in purification and cross-functional initiatives, and support purification regulatory documentation.

Key Responsibilities:

  • Design experiments and demonstrate hands-on technical leadership of all aspects of purification process development including chromatography, TFF, virus filtration, harvest and virus clearance
  • Provide scientific and technical leadership of one or more pivotal/commercial programs. Accountable for process characterization strategy, project plans, execution, risk management and delivery of functional objectives throughout the lifecycle including process optimization, process characterization, process performance qualification and technical reports for BLA submission
  • Lead and/or support technology transfer, clinical resupply and investigation activities in partnership with Global Manufacturing Sciences and Technology (MSAT)
  • Perform statistical analysis and appropriate modeling to assess process parameter criticality, identify acceptable ranges and contribute to the integrated control strategy
  • Author and review GMP and non-GMP technical documents (reports, regulatory submissions/responses, batch records, SOPs, etc.) ensuring data integrity and best documentation practices are followed
  • Represent the Pivotal & Commercial Purification Development Department on cross-functional product development/CMC teams. Requires collaboration with Analytical Development, MSAT, Cell Culture, Formulation, Manufacturing, Quality, Regulatory, and Supply Chain, as needed.
  • May manage direct reports and mentor junior team members on purification process development strategies, experimental design and execution and process transfer
  • Help to establish and maintain a state-of-the-art purification lab
  • Participate in cross-functional initiatives and business process improvements as needed
  • Some travel may be required to support technology transfers and provide oversight at external manufacturing facilities
  • Evaluation and implementation of new technologies, workflows, or data approaches to improve development efficiencies and timelines

Basic Qualifications:

  • Ph.D. with 2+ years in a relevant scientific discipline (chemical engineering, biochemistry, bioengineering).

OR

  • M.S. with 6+ years in a relevant scientific discipline (chemical engineering, biochemistry, bioengineering).

OR

  • BS with 8+ years in a relevant scientific discipline (chemical engineering, biochemistry, bioengineering).

Preferred Qualifications:

  • Experience in pivotal stage purification process development, characterization, and implementation in GMP facilities.
  • Experience in technology transfer of pivotal stage purification processes from 2-25 kL scale including understanding of process scalability, robustness, regulatory expectations, manufacturability and COGs
  • Excellent communication, technical writing and presentation skills, and aptitude for creative problem solving
  • Experience writing CMC sections of commercial regulatory filings (BLA, MAA) and post approval change filings is desired
  • Demonstrated ability to collaborate and influence cross-functionally
  • Experience in statistics, design-of-experiments, and data analysis (e.g. JMP, Spotfire)
  • Working knowledge of lab automation, data management, data science, knowledge management and data protection

People Leader Accountabilities:

  • Create Inclusion - knowing the business value of diverse teams, modeling inclusion, and embedding the value of diversity in the way they manage their teams
  • Develop Talent - understand the skills, experience, aspirations and potential of their employees and coach them on current performance and future potential. They ensure employees receive the feedback and insight needed to grow, develop and realize their purpose
  • Empower Teams - connect the team to the organization by aligning goals, purpose, and organizational objectives, and holding them to account. They provide the support needed to remove barriers and connect their team to the broader ecosystem
The salary range for this position is: $169,320.00 - $219,120.00. Gilead considers a variety of factors when determining base compensation, including experience, qualifications, and geographic location. These considerations mean actual compensation will vary. This position may also be eligible for a discretionary annual bonus, discretionary stock-based long-term incentives (eligibility may vary based on role), paid time off, and a benefits package. Benefits include company-sponsored medical, dental, vision, and life insurance plans*.

For additional benefits information, visit:

https://www.gilead.com/careers/compensation-benefits-and-wellbeing

* Eligible employees may participate in benefit plans, subject to the terms and conditions of the applicable plans.

For jobs in the United States:

Gilead Sciences Inc. is committed to providing equal employment opportunities to all employees and applicants for employment, and is dedicated to fostering an inclusive work environment comprised of diverse perspectives, backgrounds, and experiences. Employment decisions regarding recruitment and selection will be made without discrimination based on race, color, religion, national origin, sex, age, sexual orientation, physical or mental disability, geneticinformation or characteristic, gender identity and expression, veteran status, or other non-job related characteristics or other prohibited grounds specified in applicable federal, state and local laws. In order to ensure reasonable accommodation for individuals protected by Section 503 of the Rehabilitation Act of 1973, the Vietnam Era Veterans' Readjustment Act of 1974, and Title I of the Americans with Disabilities Act of 1990, applicants who require accommodation in the job application process may contact [email protected] for assistance.

For more information about equal employment opportunity protections, please view the 'Know Your Rights' poster.

NOTICE: EMPLOYEE POLYGRAPH PROTECTION ACT

YOUR RIGHTS UNDER THE FAMILY AND MEDICAL LEAVE ACT

Gilead Sciences will not discharge or in any other manner discriminate against employees or applicants because they have inquired about, discussed, or disclosed their own pay or the pay of another employee or applicant. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, (c) consistent with the legal duty to furnish information; or (d) otherwise protected by law.

Our environment respects individual differences and recognizes each employee as an integral member of our company. Our workforce reflects these values and celebrates the individuals who make up our growing team.

Gilead provides a work environment free of harassment and prohibited conduct. We promote and support individual differences and diversity of thoughts and opinion.

For Current Gilead Employees and Contractors:

Please apply via the Internal Career Opportunities portal in Workday.

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