Senior Scientist, LC-MS & ADC Analytics

Planet Pharma; Boston (MA); On-site; USD 120,000 - 190,000; Full time

Job summary

Planet Pharma is seeking a Senior Scientist with expertise in LC-MS-based antibody/protein characterization and bioanalytical quantitation to support oncology drug discovery.

The successful candidate will perform hands‑on analytical research focused on antibody conjugates, antibodies, and small molecules using LC-MS and HPLC technologies to develop, optimize, and apply analytical methods that support discovery and early development programs.

Qualifications

• Ph.D. or equivalent degree in Analytical chemistry or a related field with minimum 5 years’ experience, MS degree with 8 years’, or BS degree with 11 years’.
• Industry experience in analytical chemistry within the biopharmaceutical or pharmaceutical industry.
• Hands-on experience with protein and bioconjugate characterization using LC-MS, UV-Vis, and HPLC.
• Experience with protein sample preparation techniques, including de-glycosylation, reduction, and enzymatic digestions of ADCs.
• Working knowledge of chromatographic methods, including SEC, HIC, and reverse-phase HPLC.
• Experience operating, maintaining, and troubleshooting LC-MS and HPLC instrumentation.
• Strong analytical and problem-solving skills with excellent attention to detail.
• Ability to manage multiple priorities and work independently in a fast-paced environment.
• Excellent written and verbal communication skills, with the ability to present scientific data to multidisciplinary teams.
• Demonstrated ability to collaborate effectively with cross-functional teams, including chemists, protein engineers, and biologists.
• Scientific curiosity, a passion for innovation, and enthusiasm for evaluating and implementing emerging analytical technologies.
• A publication record in peer‑reviewed scientific journals is desira

Responsibilities

• Perform analytical characterization and quality control of ADCs, antibodies, and small molecules using LC‑MS and HPLC techniques, including: Intact mass analysis, de‑glycosylation and reducing LC‑MS, Drug‑to‑antibody ratio (DAR) determination, HPLC methods such as size exclusion chromatography (SEC), hydrophobic interaction chromatography (HIC), and reverse‑phase (RP), peptide mapping (a plus).
• Prepare and analyze samples from purified proteins and biological matrices, including plasma, serum, and tissues.
• Identify and characterize ADC metabolites from in vitro and in vivo studies using analytical techniques such as affinity capture, forced release, MS/MS, and SIM‑MS.
• Develop, optimize, validate, and troubleshoot analytical methods to improve performance and resolve technical challenges.
• Operate, maintain, and troubleshoot analytical instrumentation, such as Thermo Vanquish UHPLC‑Orbitrap MS, Waters Acquity UPLC‑SQD MS, Agilent HPLC, and UV‑Vis systems.
• Evaluate and recommend new analytical technologies and instrumentation to expand internal capabilities.
• Document experimental work in electronic laboratory notebooks (ELNs), maintain analytical databases, and prepare technical reports and project summaries.
• Present experimental results and scientific findings to multidisciplinary project teams.
• Contribute to laboratory operations by maintaining shared equipment, supporting laboratory organization, and improving analytical workflows and efficiencies.

Skills

LC-MS analysis

HPLC techniques

Analytical chemistry

Team collaboration

Scientific communication

Education

Ph.D. in Analytical Chemistry

MS in Analytical Chemistry

BS in Chemistry

Tools

Thermo Vanquish UHPLC-Orbitrap MS

Waters Acquity UPLC-SQD MS

Agilent HPLC

UV-Vis spectrometry

Job description

Planet Pharma is seeking a Senior Scientist with expertise in LC-MS-based antibody/protein characterization and bioanalytical quantitation to support oncology drug discovery.

The successful candidate will perform hands‑on analytical research focused on antibody conjugates, antibodies, and small molecules using LC-MS and HPLC technologies to develop, optimize, and apply analytical methods that support discovery and early development programs.