# Associate Scientist in Protein Mass Spectrometry at Pfizer

Pfizer is hiring an Associate Scientist in Protein Mass Spectrometry. It pays $60k-$100k a year and Level rates it Little AI ●○○○; you can [apply on Pfizer](https://jobsbylevel.com/go/f34b07cc-d526-44b7-8e00-4dec7f806168?utm_medium=ai-agent).

AI Level 1, AI centrality 10 out of 100. United States - Connecticut - Groton.

## Details

- Company: [Pfizer](https://jobsbylevel.com/companies/pfizer)
- AI level: AI Level 1 (score 10 out of 100)
- Location: United States - Connecticut - Groton
- Salary: $60k-$100k
- Posted: October 21, 2026
- Apply: https://jobsbylevel.com/go/f34b07cc-d526-44b7-8e00-4dec7f806168?utm_medium=ai-agent

## Prepare for this job

The job page lists 5 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/associate-scientist-in-protein-mass-spectrometry-at-pfizer-c2d29d

## Description

ROLE SUMMARY Pfizer currently has an open position for an Associate Scientist in Protein Mass Spectrometry (MS) within the Structural Analytical and Molecular Sciences (SAMS) department in Groton, CT. We are seeking a highly motivated individual with strong expertise in biochemistry and experimental protein characterization. Experience in native MS, nanoelectrospray applications or MS characterization of large molecules is a strong plus. The successful candidate will demonstrate scientific proficiency from the bench, be a fast learner of new skills, and work effectively in a matrix team environment. We are an integrated and highly collaborative team of colleagues with technical expertise across molecular biology, protein biochemistry, biophysics, and structural biology. We have a strong track record of enabling hit-to-lead progression for small molecule modulators of diverse protein targets using integrated biophysical and structural approaches. We actively collaborate with Pfizer drug discovery teams across multiple therapeutic areas by providing comprehensive molecular and structural insights into therapeutic targets, lead molecules, and protein-ligand interactions. ROLE RESPONSIBILITIES Learn and deploy native MS and other structural MS methods for deep characterization of protein-ligand interactions Handle and manipulate protein samples to enable and execute quantitative and qualitative binding studies. Support and maintain open-access MS systems for a suite of users and assist with data collection and processing where needed. Be part of multi-disciplinary teams to support discovery projects across diverse disease areas. Effective oral and written communication of experimental work and analysis. Perform timely notebook entries and review for completed experiments. QUALIFICATIONS BS in chemistry, biochemistry, biophysics, molecular biology or related field with ~1-3 years of relevant laboratory experience. Skill and familiarity with handling and manipulating recombinant protein samples Ability to multi-task to balance parallel activities. Ability to troubleshoot scientific and technical challenges and contribute to their resolution. Previous experience with mass spec instrumentation and data analysis is a strong plus. Experience using common AI tools, including generative technologies such as ChatGPT or Microsoft Copilot, to support problem solving and enhance productivity. Demonstrated curiosity for exploring how these tools can improve outcomes and understanding of responsible AI practices, including risk management and ethical use. PHYSICAL/MENTAL REQUIREMENTS Sitting, standing, lifting, bending, and walking. Ability to perform practical laboratory bench work and work on a computer (while standing or sitting). Ability to perform mathematical calculations and interpret data. NON-STANDARD WORK SCHEDULE, TRAVEL OR ENVIRONMENT REQUIREMENTS Minimal, if any travel related to this position. Candidate must comply with laboratory safety practices Work Location Assignment: On Premise The annual base salary for this position ranges from $60,200.00 to $100,400.00. 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.

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