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ob Title: Research Scientist / Sr. Research Scientist
Location: Cambridge, MA
Remote Flexibility: No (laboratory-based)
Contract Term: 12 months, likely extension or conversion

Position Overview

We are currently seeking a Research Scientist/Sr. Research Scientist with extensive expertise in mass spectrometry-based bioanalysis, protein/peptide characterization, and analytical assay development.

The successful candidate will contribute to bioanalytical method development, validation, and large-scale study support across discovery and clinical programs, with a strong focus on LC-MS/MS (MRM), immunoprecipitation, and complementary biochemical techniques. This is a cross-functional role with significant impact on therapeutic discovery and development.

Key Responsibilities

• Lead the development, optimization, and validation of LC-MS/MS assays (MRM mode) and IP assays for quantification of biomarkers, proteins, peptides, cytokines, and metabolites.

• Design and execute workflows for peptide mapping, PTM analysis, disulfide bond mapping, and glycosylation analysis.

• Develop fit-for-purpose bioanalytical methods for proteins with complex attributes (e.g., high MW, high glycosylation, unexpected MWs) using advanced enzymatic digestion strategies (deglycosylation, limited proteolysis).

• Support cross-functional groups by providing detailed biochemical and analytical characterization of proteins and reagents.

• Conduct advanced data processing and statistical analysis using multiple software platforms.

• Maintain and troubleshoot instruments.

• Author technical reports, SOPs, and electronic notebooks.

Qualifications

• Minimum of 3 years of relevant industry experience with MS, or PhD.

• Extensive experience with mass spectrometry analysis of proteins and peptides (QTRAP, Q-TOF, MALDI-TOF, Orbitrap Fusion/Lumos, QQQ with MRM method).

• Demonstrated expertise in bioanalytical method development and validation for small and large molecules.

• Experience performing intact and subunit protein MS analysis, including characterization of monoclonal antibodies, fusion proteins, and bispecific/trispecific biologics.

• Strong working knowledge of biochemical assays (enzyme assays, colorimetric assays).

• Hands-on experience with chromatography techniques (RP-HPLC, SEC, HILIC, nanoLC, microLC).

• Proficiency in wet lab sample preparation techniques (SPE, IP, LLE).

Work Environment

• Laboratory-based position in Cambridge, MA.

• Fast-paced environment.

• Close collaboration with cross-functional R&D and bioanalytical teams.

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