LC-MS/MS Scientist

The work we do at Eurofins Professional Scientific Services matters, and so do our employees. At Eurofins PSS, we put a focus on your professional growth. We provide our employees the ability to break into the biopharmaceutical industry and grow from the bottom up. We have the supportive teams and tools available to invest in you while also affording you work-life balance and a competitive benefits package.

Eurofins Scientific is an international life sciences company, providing a unique range of analytical testing services to clients across multiple industries, to make life and our environment safer, healthier and more sustainable. From the food you eat, to the water you drink, to the medicines you rely on, Eurofins works with the biggest companies in the world to ensure the products they supply are safe, their ingredients are authentic and labelling is accurate. Eurofins believes it is a global leader in food, environmental, pharmaceutical and cosmetics products testing and in agroscience CRO services. It is also one of the global independent market leaders in certain testing and laboratory services for genomics, discovery pharmacology, forensics, CDMO, advanced material sciences and in the support of clinical studies.

If you’re looking for a rewarding career, a place to call home, apply with us today!

We are seeking a skilled LC-MS/MS Scientist to support peptide characterization and modification analysis using high-resolution mass spectrometry. This role is focused on method development, workflow optimization, and data interpretation to support advanced molecular characterization efforts. The ideal candidate will bring deep expertise in peptide mapping and fragmentation techniques within a laboratory environment.

Key Responsibilities

• Develop, optimize, and execute accurate-mass LC–MS/MS workflows for peptide sequence confirmation and characterization of peptide modifications
• Apply high-resolution MS and MS/MS fragmentation techniques, including CID, HCD, and ETD, to enable confident identification and site localization of peptide modifications and isomers
• Optimize sample preparation and enzymatic digestion conditions to improve detection and characterization of low-abundance modifications
• Analyze and interpret complex mass spectrometry datasets using industry-standard software tools
• Advance and refine LC-MS/MS methods to support broader molecular characterization initiatives
• Document experimental procedures, analytical results, and interpretations clearly and in accordance with best practices
• Communicate findings effectively to cross-functional project teams

Required Qualifications

• Experience with LC-MS/MS peptide identification and modification analysis, including CID, HCD, and ETD
• Ability to work independently and collaboratively
• BS (5–8 yrs), MS (3–6 yrs), or PhD (0–2 yrs) in Chemistry, Biochemistry, or related field, or equivalent experience
• Authorization to work in the United States indefinitely without restriction or sponsorship.

Preferred Qualifications

• Experience with LC-MS/MS method development and optimization
• Familiarity with proteomics or peptide data analysis software
• Experience in a GMP or regulated environment
• Knowledge of LIMS and data management systems

The position is Full Time, Monday through Friday, 8am-5pm, with overtime as needed. Candidates living within a commutable distance of Andover, MA, are encouraged to apply.

What we offer:

• Excellent full-time benefits, including comprehensive medical coverage, dental, and vision options
• Life and disability insurance
• 401(k) with company match
• Paid vacation and holidays
• Yearly goal-based bonus & eligibility for merit-based increases
• Hourly rate is between $30.00 $33.00, depending on education and experience

Eurofins USA PSS Insourcing Solutions is a Disabled and Veteran Equal Employment Opportunity employer.