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LC-MS Chemist - Metabolism

Labcorp · Madison, WI · Full time

Posted Aug 27, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you solved a scientific problem on your own before asking for help.

What they are checking: Whether they can work independently while knowing when to bring in a Lead Scientist.

Tell me about a time you had to rerun work because of an error. What did you learn?

What they are checking: Whether they are honest about mistakes and change their process afterward.

What would you do

You see a sudden drop in internal standard response across a run. What do you do?

What they are checking: Whether they troubleshoot ion suppression, injection or prep issues and document what happened.

A Lead Scientist asks you to run an advanced validation task you have not done before. How do you prepare?

What they are checking: Whether they read the SOP, ask questions and plan before starting, rather than learning by trial and error.

How do you manage several validation projects with different deadlines?

What they are checking: Whether they can plan instrument time and priorities and tell leads early when timelines slip.

About the work

Walk me through a method validation you performed on an LC-MS system. What parameters did you test?

What they are checking: Whether they know accuracy, precision, selectivity, carryover and stability, and have done the work themselves.

Your calibration curve is not linear at the high end. What would you check?

What they are checking: Whether they consider detector saturation, weighting and sample prep before blaming the instrument.

How do you work within GLP and GCP rules when running validation activities?

What they are checking: Whether they understand documentation and SOP requirements that make data defensible.

How would you approach identifying metabolites in a sample from a metabolism study?

What they are checking: Whether they understand mass shifts, fragmentation and how metabolism studies use LC-MS data.

How do you keep your lab notebook and electronic data in shape for an audit?

What they are checking: Whether they keep records complete and traceable in real time, not filled in later.

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The full job description

As published by Labcorp.

Labcorp is a global leader in laboratory services, providing the insights and answers that help healthcare providers, patients, researchers, pharmaceutical companies and health systems make confident decisions and improve outcomes. Through our unparalleled science, data, technology and laboratory network, we advance diagnostics, accelerate innovation and help address some of the world’s most important health challenges. As we shape the future of healthcare, we are leveraging advanced technologies, intelligent digital solutions and data-driven innovation across our operations to enhance how work gets done and deliver greater value to customers and patients. With our global scale and deep expertise, you’ll have the opportunity to do meaningful work, grow your career and make a real impact on people’s health around the world. Together, we’re improving health and improving lives. Labcorp is seeking an LC-MS Chemist – Metabolism to join our team in Madison, WI. Work Schedule: Monday - Friday 8:00 am - 5:00 pm Job Responsibilities • Organize and independently perform routine to moderate-level method validation activities in compliance with SOPs and regulatory guidelines (GLP/GCP). • Execute advanced method validation tasks with guidance from a Lead Scientist. • Apply intermediate data interpretation and analytical instrumentation skills to resolve procedural and scientific problems with minimal assistance. • Assist in the review of reports, methods, protocols, and SOPs; maintain complete and audit-ready study documentation. • Communicate problems, deviations, and corrective actions to Lead Scientist and/or management in a timely manner. • Manage assigned project work, coordinating activities with team members to deliver high-quality data to internal clients on schedule. • Collaborate effectively with colleagues across the Bioanalytical site and support cross-functional communications with external clients. • Train and mentor less experienced laboratory staff. • Contribute to process improvement initiatives and participate in department-wide quality initiatives. • Maintain a clean, safe, and organized laboratory environment. Minimum Qualifications: • Bachelor's degree in Life Sciences, Chemistry, Biotechnology, or a related field. • 1.5 or more years of hands-on experience with LC-MS/MS bioanalysis, including MRM-based quantitation and method execution. • 1.5 or more years of experience with ADME/PK assays such as liver microsomal stability, permeability assays (e.g., MDCK-MDR1), and PK sample processing (plasma, tissue lysates). • 1.5 or more years operating triple quadrupole mass spectrometer platforms (e.g., Waters Xevo TQS, Agilent 6400 QQQ, SCIEX 5500, and SCIEX 6500). Preferred Qualifications: • Master's degree in Life Sciences, Chemistry, Biotechnology, or a related field. • 1 or more years of exposure to CYP inhibition or Time-Dependent Inhibition (TDI) assays and drug-drug interaction (DDI) studies. • 1 or more years of experience assisting in the development or optimization of new bioanalytical methods. Additional Job Standards: • Proficiency with data acquisition and processing software (MassLynx, MassHunter, Analyst, or equivalent). • Proficiency with ELN documentation, word processing, spreadsheet, and specialized analytical software. • Strong attention to detail with demonstrated ability to generate reproducible, high-quality bioanalytical data. • Familiarity with Orbitrap platforms or other high-resolution mass spectrometry systems. • Knowledge of regulatory guidelines including FDA, EMA, and ICH bioanalytical method validation guidance. • Experience working in a GLP/GCP-regulated environment (CRO or pharmaceutical/biotech industry). • Excellent written and verbal communication skills. • Proven ability to prioritize workloads and manage time effectively in a fast-paced laboratory environment. Benefits: Employees regularly scheduled to work 20 or more hours per week are eligible for comprehensive benefits including: Medical, Dental, Vision, Life, STD/LTD, 401(k), Paid Time Off (PTO) or Flexible Time Off (FTO), Tuition Reimbursement and Employee Stock Purchase Plan. Employees regularly scheduled to work less than 20 hours, Casual, Intern, and Temporary employees are only eligible to participate in the 401(k) Plan. For more detailed information, please  click here . Labcorp is proud to be an Equal Opportunity Employer: Labcorp strives for inclusion and belonging in the workforce and does not tolerate harassment or discrimination of any kind. We make employment decisions based on the needs of our business and the qualifications and merit of the individual. Qualified applicants will receive consideration for employment without regard to race, religion, color, national origin, sex (including pregnancy, childbirth, or related medical conditions), family or parental status, marital, civil union or domestic partnership status, sexual orientation, gender identity, gender expression, personal appearance, age, veteran status, disability, genetic information, or any other legally protected characteristic. Additionally, all qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law. We encourage all to apply If you are an individual with a disability who needs assistance using our online tools to search and apply for jobs, or needs an accommodation, please visit our accessibility site or contact us at Labcorp Accessibility. For more information about how we collect and store your personal data, please see our Privacy Statement .

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