Scientist, Biology

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 We are seeking a highly motivated Scientist, Biology to support pharmacokinetic (PK) bioanalysis for large molecules and antibody-drug conjugates (ADCs) across discovery and early development programs. This hands-on, laboratory-based role will be responsible for developing, implementing, and executing high-throughput bioanalytical methods that generate high-quality, decision-enabling data for research and development teams.

The successful candidate will work closely with cross-functional partners and contribute to advancing biologics and ADC programs through innovative bioanalytical solutions. This role is ideal for a scientifically driven individual who thrives in a fast-paced environment, demonstrates strong ownership and leadership, and is excited to expand their impact beyond bioanalysis into broader drug discovery initiatives.

Key Responsibilities Lead the development, optimization, validation, and implementation of high-throughput bioanalytical methods supporting preclinical pharmacokinetic studies for biologics and ADCs. Design, develop, and execute bioanalytical assays using ligand-binding, immunochemical, and mass spectrometry-based platforms, incorporating laboratory automation where appropriate.

Analyze, interpret, and communicate bioanalytical and pharmacokinetic data using industry-standard software and analytical approaches. Operate, troubleshoot, and maintain analytical instrumentation, including LC-MS/MS systems and ligand-binding assay platforms.

Prepare and present scientific reports, technical documentation, and study summaries to internal stakeholders. Partner effectively with cross-functional teams including Discovery Biology, DMPK, Bioanalytical Sciences, and Translational Research.

Identify opportunities to improve workflows, enhance assay performance, and expand bioanalytical capabilities through innovative approaches and technologies. Contribute to broader discovery and development efforts by applying scientific expertise to complex biological questions.

Basic Qualifications Bachelor's degree and 6+ years of relevant experience, OR Master's degree and 4+ years of relevant experience, OR PhD or PharmD with relevant scientific training Preferred Qualifications Degree in Pharmaceutical Sciences, Biochemistry, Biology, Chemistry, or a related scientific discipline. 2-5 years of hands-on industry experience in bioanalysis, pharmacokinetics, or related areas.

Strong expertise in ligand-binding assays and bioanalytical methodologies for biologics and ADCs. Hands-on experience with immunoprecipitation, enzymatic digestion, LC-MS/MS, MSD platforms, and other ligand-binding assay technologies. Demonstrated experience processing biological samples and quantifying biologics, small molecules, ADCs, payloads, and metabolites, including biotransformation assessments.

Proficiency in pharmacokinetic data analysis software, including Phoenix WinNonlin or comparable tools. Experience developing, standardizing, and implementing bioanalytical methods in a regulated research environment. Experience with laboratory automation and high-throughput screening platforms.

Familiarity with in vitro assay development and screening technologies. Working knowledge of HTS workflows using 96-, 384-, and 1536-well assay formats. Excellent organizational skills with the ability to manage multiple priorities independently while maintaining high-quality scientific output.

The salary range for this position is: $146,540.00 - $189,640.00. 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, genetic information 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 ApplicantAccommodations@gilead.com 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.