The original Pfizer Senior Associate Scientist – Bioassay vacancy in Pearl River is closed. Its archived deadline was 25 July 2025. Review the historical role, research skills and application preparation; a separate Pfizer analytical-testing opportunity in Chesterfield, Missouri, has been identified under Job ID 4963460.
Vacancy Status and Historical Details
| Original role | Senior Associate Scientist – Bioassay |
|---|---|
| Employer | Pfizer |
| Original site | Pearl River, New York, USA |
| Historical deadline | 25 July 2025, as recorded in the archived CareerAidHub vacancy |
| Status | CLOSED — original posting is not a current opportunity |
| Original salary | Archived base salary $66,500–$110,900/year; not independently reconfirmed against the expired employer notice |
| New application window for same role | Not verified |
| Current Pfizer vacancy search | Use Pfizer’s official careers pages, with role-specific location and job ID |
About the Archived Pfizer Bioassay Role
Pfizer previously advertised a laboratory-based Senior Associate Scientist – Bioassay position at Pearl River supporting vaccine research, immunological assays, data analysis and regulated laboratory work. The original CareerAidHub record lists a 25 July 2025 closing date. This page preserves the historical context, but the expired advertisement cannot be used to establish present duties, salary or application availability.
Bioassay and Vaccine R&D Research Skills
- Cell-based and immunological assays relevant to vaccine development, with appropriate quality controls.
- Mammalian cell culture and biological sample preparation in compliant laboratory environments.
- ELISA and other immunoassay platforms, with attention to assay sensitivity, precision and robustness.
- Molecular biology methods such as qPCR when directly relevant to the advertised assignment.
- Analytical method qualification, documentation, troubleshooting and data-integrity practices.
- Cross-functional communication in R&D, quality and regulated product-development teams.
These technical topics are drawn from the historical article and related industry research practices; they are not guaranteed requirements for every Pfizer scientist job.
Academic and Professional Profile
The archived CareerAidHub record described a bachelor’s degree in a biological science with at least three years of laboratory experience, or postgraduate training combined with relevant experience. Because the original Pfizer notice was not independently recovered, applicants should treat these as historical descriptions, not verified eligibility conditions for an active position.
- Describe original contributions to assay development, validation, sample preparation and data interpretation.
- Separate direct experience with GLP/GMP laboratory work from general familiarity with compliance terminology.
- Document relevant scientific software, laboratory instruments, troubleshooting and reliable recordkeeping.
- Compare your profile against each current official Pfizer job description before submitting an application.
Historical Salary and Benefits
The earlier CareerAidHub article reported US$66,500–US$110,900 annually for the original Pearl River role and a possible incentive bonus. These historical figures could not be validated against the expired original notice and should not be advertised as current salary.
Benefits and relocation assistance depend on job, geography and eligibility. Current compensation details must come from the exact, live Pfizer job posting.
How to Find and Apply for Current Pfizer Roles
- Open Pfizer’s official career search and search for bioassay, analytical testing, biotherapeutics or Senior Associate Scientist.
- Read the exact job ID, location, application availability and site-specific qualifications.
- Confirm whether the role requires permanent U.S. work authorisation and whether sponsorship is unavailable.
- Tailor the CV using verified assay work, method-development experience, quality documentation and measurable achievements.
- Submit only through the authorised Pfizer application portal and retain the confirmation.
The expired 2025 Pearl River vacancy should not be used as an active application route.
CV and Interview Preparation
- Present one or two concrete analytical/bioassay projects with purpose, methods, controls and verified outcomes.
- Discuss assay qualification, precision, specificity, sensitivity and reproducibility where relevant to your actual work.
- Demonstrate careful laboratory records and cGMP/GLP data practices without overstating regulatory experience.
- Prepare examples of assay troubleshooting, unexpected results and cross-functional problem solving.
- Match evidence to either immunological bioassay roles or broader analytical biotherapeutics positions, rather than presenting them as identical.
Monitoring Future Pfizer Opportunities
Pfizer’s R&D vacancies can change without a regular annual cycle. No 2026 or 2027 reopening date for the original Pearl River job has been verified. The most useful approach is to monitor current official vacancy IDs and apply only where the listing remains active, rather than relying on an old deadline or inferring that recruitment will recur automatically.
Frequently Asked Questions
Is the Pearl River Pfizer Bioassay vacancy still open?
No. The original CareerAidHub listing recorded a 25 July 2025 closing date; a reopening of that specific posting has not been verified.
Is the Missouri scientist opening the same job?
No. Pfizer Job ID 4963460 is a separate analytical-testing position in Chesterfield, Missouri.
What is the current Pfizer salary for the Chesterfield role?
The retrieved official listing publishes US$68,600–US$114,300 in annual base salary. The original Pearl River historical salary must not be confused with it.
Can overseas applicants receive visa sponsorship for Job ID 4963460?
The official Chesterfield posting says U.S. work visa sponsorship is unavailable and permanent U.S. work authorisation is required.
Is a PhD essential for Pfizer senior associate scientist roles?
Not for the separate Chesterfield job, which lists bachelor’s- and master’s-based experience routes; check each current posting.
Which technical skills are most relevant?
Skills vary by role; examples include ELISA, cell-based assays, HPLC/UPLC, method validation and cGMP documentation.
Where do I apply for a new Pfizer job?
Use Pfizer’s official careers portal and verify the job ID and current Apply Now status.
Is there a confirmed new deadline for the old Pearl River job?
No reopening or next application deadline has been verified.
Official and Primary Sources
- Pfizer Official Vacancy — Biotherapeutics and Vaccines Analytical Testing (Job 4963460)
- Pfizer Careers — Current Opportunities
Editorial review: 10 October 2026. The Pearl River 2025 salary and vacancy requirements are retained only as archived CareerAidHub details; the original employer notice was not recovered. The Chesterfield salary and criteria are from the distinct Pfizer Job 4963460 official posting. Pfizer’s live careers site is authoritative for application status.
