Senior Analytical Chemist – Protein Conjugation & LC-MS

Randstad USA; Trenton (NJ); On-site; USD 56,000 - 63,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Life insurance

401K plan

Job summary

Randstad USA is seeking an analytical Senior Scientist in Lawrenceville, NJ, to lead physicochemical characterization and conjugation of novel protein reagents. This fully onsite, 1-year contract offers exposure to advanced bioanalytical assays driving pipeline therapies and features a standard daytime schedule.

Responsibilities include leading LC-MS, SEC‑RI, and UV‑Vis analyses, developing and validating assays, and documenting results for cross-functional teams.

Qualifications

• Bachelor's degree in Chemistry, Biochemistry, or related science with 3+ years biotech experience, OR Master's with 1+ years.
• Experience with LC-MS, SEC, and RP-HPLC; knowledge of protein conjugation chemistry.
• Strong troubleshooting, data interpretation, and technical reporting; cross-functional collaboration.

Responsibilities

• Design, execute, and interpret LC-MS, SEC‑RI, and UV‑Vis experiments to evaluate physicochemical properties of antibody and non-antibody protein reagents.
• Develop, validate, and implement qualitative and quantitative assays with minimal supervision.
• Support protein conjugation chemistry initiatives and refine characterization protocols across multiple analytical platforms.
• Troubleshoot complex analytical instrumentation and resolve technical malfunctions.
• Synthesize raw data into clear reports, present findings to cross‑functional project teams, and maintain thorough compliance documentation.

Skills

LC-MS

SEC

SEC‑RI

Reverse Phase Chromatography

Protein Conjugation Chemistry

UV‑Vis

Assay Development

Method Validation

Instrument Troubleshooting

Data Interpretation

Flow Cytometry

Immunoassays

IHC

Education

Bachelor's degree in Chemistry, Biochemistry, or related science

Master's degree

Tools

LC-MS instrumentation

SEC instrumentation

RP-HPLC platforms

Job description

Randstad USA is seeking an analytical Senior Scientist in Lawrenceville, NJ, to lead physicochemical characterization and conjugation of novel protein reagents. This fully onsite, 1-year contract offers exposure to advanced bioanalytical assays driving pipeline therapies and features a standard daytime schedule.

Responsibilities include leading LC-MS, SEC‑RI, and UV‑Vis analyses, developing and validating assays, and documenting results for cross-functional teams.