Skip to content
Updated How AI-exposed are the skills employers are hiring for? See the data →

From the employer's careers site First seen 2 Nov 2026

Mass Spectrometrist

Pfizer Groton On-site senior full-time

Salary

$93,600 to $156,000 per year

Apply on Pfizer

Description

At Pfizer, our purpose is to deliver breakthroughs that change patients' lives. Central to this mission is our Research and Development team, which strives to translate advanced science and innovative technologies into impactful therapies and vaccines.

An opening is available for a Mass Spectrometrist in the Structure Elucidation Group within Pfizer Worldwide Research and Development’s Pharmaceutical Sciences Synthetic Molecule Division in Groton, CT. The Structure Elucidation Group plays a critical role across the pharmaceutical development continuum, supporting programs from drug substance through drug product and beyond.

You will elucidate chemical structures and solve scientific questions for small molecules of pharmaceutical interest using high resolution mass spectrometry tools. You will work within a team of disparate scientific disciplines as a subject matter expert, providing strong technical and strategic input to ensure efficient and timely execution of deliverables. You will investigate innovative scientific approaches to all aspects of mass spectrometry support for pharmaceutical development, utilize digital tools to enhance workflows, write technical documents, and publish and present externally.

Qualifications

  • B.S./M.S. in chemistry with 9 to 11 years of experience in mass spectrometry focused on structural elucidation, or MBA/MS with 7 to 8 years of experience OR a Ph.D. 0 to 3 years of experience. in chemistry or equivalent with a focus on mass spectrometry applications (experience with peptide/proteomics preferred).
  • Strong understanding of mass spectrometry theory and applications.
  • Experience with the structure elucidation of small molecules and/or peptides.
  • Fundamental understanding of organic chemistry.
  • Familiarity with MS data analysis software for small molecules and peptides, such as Thermo Freestyle, ACD/Labs, BioPharma Finder, and Protein Metrics.
  • Ability to work independently in problem-solving and research.
  • Experience using HRMS systems, particularly Thermo Orbitrap instruments.
  • Strong communication skills.

Benefits

  • Comprehensive and generous benefits and programs to help our colleagues lead healthy lives and to support each of life’s moments.
  • 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.
  • Health benefits to include medical, prescription drug, dental and vision coverage.

Skills

Required

  • mass spectrometry
  • structural elucidation
  • chemistry
  • organic chemistry
  • MS data analysis software

Nice to have

  • peptide/proteomics
  • Thermo Orbitrap instruments
  • ionization induced fragmentation mechanisms
Apply on Pfizer