Sr. Associate Scientist, Bioassay & Impurity Sciences

Why Patients Need You
At Pfizer, our purpose is to deliver breakthroughs that change patients' lives-and our Research and Development teams are at the forefront of making that happen. We bring together advanced science and innovative technologies to turn bold ideas into therapies and vaccines that matter most.
Whether you're passionate about discovery science, advancing product and process understanding, or supporting clinical development, you'll have the opportunity to make a real impact. Here, you'll work with cutting-edge tools and collaborate with talented teams to accelerate the development of best-in-class medicines for patients around the world.
What You Will Achieve
In this role, you will independently execute routine experiments with minimal variability and support more complex studies under guidance. You will analyze data, document findings in electronic laboratory notebooks, and prepare clear summaries and reports. You will collaborate cross-functionally and communicate results to team and departmental audiences. You may also contribute to the development and continuous improvement of potency assay workflows, including the implementation of automated solutions to enhance robustness, throughput, and data quality.
How You Will Achieve It

• Independently execute routine experiments with minimal variability in design and execution
• Plan and perform more complex experiments with appropriate guidance
• Apply scientific principles to support assay development, process and product understanding, and related activities
• Analyze and interpret data; troubleshoot experimental issues and identify unexpected results with guidance
• Develop and refine experimental protocols
• Accurately document experimental work in electronic laboratory notebooks
• Summarize and clearly communicate results to team and departmental audiences
• Author technical reports, protocols, and supporting documentation
• Collaborate effectively across cross-functional teams to achieve project goals
• Leverage scientific literature to inform experimental design and data interpretation
• Support lab operations, including equipment maintenance and continuous improvement initiatives
• Contribute to the development, optimization, and implementation of automated potency assay workflows to improve robustness, throughput, and data quality

Qualifications
Must-Have

• BA/BS with at least 3+ years of experience or MBA/MS with any years of experience
• Demonstrate technical expertise in immunological and cell-based assays, including ELISAs, cytotoxicity assays, tissue culture, and molecular biology techniques
• Experience with mammalian cell culture and aseptic technique
• Experience with high-throughput liquid handling and automation platforms
• Strong scientific curiosity and understanding of potency assays
• Ability to critically evaluate, adapt, and apply scientific techniques
• Understanding of project scope and how individual work contributes to broader departmental and organizational goals
• Highly motivated and able to work effectively in a fast-paced, matrixed environment
• Strong interpersonal skills with the ability to collaborate in a multidisciplinary team
• Excellent written and verbal communication skills
• Well-organized, independent, and solution-oriented with a creative approach to problem-solving

Nice-to-Have

• Pharmaceutical and biotech drug discovery experience
• Experience in developing and troubleshooting bioassays designed to assess functionality
• Experience with live-cell imaging systems
• Experience with Hamilton liquid handlers
• Experience using common AI tools, including generative technologies such
  as ChatGPT or Microsoft Copilot, to support problem solving and enhance

PHYSICAL/MENTAL REQUIREMENTS
Position requires occasional light lifting and periods of standing, sitting or walking.
Work Location Assignment: On Premise
The annual base salary for this position ranges from $68,600.00 to $114,300.00. In addition, this position is eligible for participation in Pfizer's Global Performance Plan with a bonus target of 7.5% of the base salary. We offer comprehensive and generous benefits and programs to help our colleagues lead healthy lives and to support each of life's moments. Benefits offered include a 401(k) plan with Pfizer Matching Contributions and an additional Pfizer Retirement Savings Contribution, paid vacation, holiday and personal days, paid caregiver/parental and medical leave, and health benefits to include medical, prescription drug, dental and vision coverage. Learn more at Pfizer Candidate Site - U.S. Benefits | (uscandidates.mypfizerbenefits.com). Pfizer compensation structures and benefit packages are aligned based on the location of hire. The United States salary range provided does not apply to Tampa, FL or any location outside of the United States.
Relocation assistance may be available based on business needs and/or eligibility.
Candidates must be authorized to be employed in the U.S. by any employer.
U.S. work visa sponsorship (such as TN, O-1, H-1B, etc.) is not available for this role now or in the future.
Sunshine Act
Pfizer reports payments and other transfers of value to health care providers as required by federal and state transparency laws and implementing regulations. These laws and regulations require Pfizer to provide government agencies with information such as a health care provider's name, address and the type of payments or other value received, generally for public disclosure. Subject to further legal review and statutory or regulatory clarification, which Pfizer intends to pursue, reimbursement of recruiting expenses for licensed physicians may constitute a reportable transfer of value under the federal transparency law commonly known as the Sunshine Act. Therefore, if you are a licensed physician who incurs recruiting expenses as a result of interviewing with Pfizer that we pay or reimburse, your name, address and the amount of payments made currently will be reported to the government. If you have questions regarding this matter, please do not hesitate to contact your Talent Acquisition representative.
EEO & Employment Eligibility
Pfizer is committed to equal opportunity in the terms and conditions of employment for all employees and job applicants without regard to race, color, religion, sex, sexual orientation, age, gender identity or gender expression, national origin, disability or veteran status. Pfizer also complies with all applicable national, state and local laws governing nondiscrimination in employment as well as work authorization and employment eligibility verification requirements of the Immigration and Nationality Act and IRCA. Pfizer is an E-Verify employer. This position requires permanent work authorization in the United States.
Pfizer endeavors to make www.pfizer.com/careers accessible to all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process and/or interviewing, please email [email protected] . This is to be used solely for accommodation requests with respect to the accessibility of our website, online application process and/or interviewing. Requests for any other reason will not be returned.
To learn more about acceptable and prohibited uses of AI during the recruitment process, please review our candidate AI-use guidelines available on Pfizer Careers .
Research and Development