Analytical Chemist — LC-MS, GC-MS & ICP-MS

• Location
  :
  Middlesex, NJ (on-site)
• Department
  :
  Analytical Chemistry
• Reports to: Laboratory Manager
• Employment
  :
  Full-time
• Schedule
  :
  Day shift, with occasional weekend coverage
• Level
  :
  Open (mid-level through senior)

Anresco NJ Labs is a full-service, FDA- and DEA-inspected, ISO/IEC 17025:2017-accredited, cGMP analytical chemistry and microbiology contract laboratory. With more than 85 years of analytical heritage behind us, we serve clients across the pharmaceutical, nutraceutical, dietary supplement, cosmetic, chemical, and hemp/CBD industries — performing compendial (USP, EP, JP, BP) testing, batch release and stability work, method development, validation, verification and transfer, and FDA deficiency response.

Our work is rarely routine. Each day brings new sample matrices, new products, and new analytical questions — from raw materials and APIs to finished dosage forms, botanical extracts, and novel formulations. We are looking for a scientist, not a button-pusher: someone who is energized by the next unfamiliar sample on the bench.

As an Analytical Chemist on our mass-spectrometry team, you will run, troubleshoot, and develop methods on advanced LC-MS, GC-MS, and ICP-MS platforms. You will work across multiple client projects in parallel — interpreting data, defending results, and frequently being the first person to analyze a brand-new product. The role demands strong critical thinking, sound judgment under cGMP, and genuine curiosity about chemistry, instrumentation, and the science behind every result we report.

This is a hands-on bench role with real intellectual range. You will not be doing the same assay every day.

• Run advanced MS analyses — Operate, maintain, and troubleshoot LC-MS (single-quad, triple-quad, Q-TOF/Orbitrap-class), GC-MS (single-quad and MS/MS, headspace and direct injection), and ICP-MS instrumentation for routine and non-routine analyses.
• Analyze a wide sample range — Quantitative and qualitative work across pharmaceuticals (APIs, excipients, finished products), nutraceuticals, botanicals, cosmetics, hemp/CBD, and chemical samples — including assay, impurities, residual solvents, nitrosamines, elemental impurities (USP /, ICH Q3D), pesticides, mycotoxins, and trace metals.
• Develop and validate methods — Develop, optimize, validate, verify, and transfer methods to compendial standards (USP, EP, JP, BP) and to ICH, FDA, EPA, and AOAC requirements. Write protocols, method SOPs, and validation reports.
• Think, don't just acquire — Interpret chromatograms and mass spectra critically — investigate anomalies, identify root causes, propose corrective actions, and document deviations and OOS/OOT events under cGMP and ISO/IEC 17025:2017.
• Learn continuously — Stay current on emerging compounds, regulatory updates, and new compendial methods, and bring that learning back to the team. Each new product is an opportunity to extend our scope.
• Own your instruments — Maintain instrument logs, calibration, qualification (IQ/OQ/PQ), preventive maintenance, and consumable inventory. Drive small improvements that reduce downtime and increase data quality.
• Defend your data — Generate audit-ready, defensible data with proper data integrity (ALCOA+), participate in client and regulatory audits, and support investigations and CAPAs.
• Help others grow — Mentor junior analysts, peer-review data, and contribute to a collaborative, quality-first lab culture.

• B.S. or M.S. in Analytical Chemistry, Chemistry, Biochemistry, Pharmaceutical Sciences, or a closely related discipline.
• Hands‑on experience operating and maintaining at least two of the…