Principal Scientist - Antibody Characterization, Optimization & Immunology

Principal Scientist, Molecular Analytics and Bioanalytical Research and Instrumentation Center (BRIC)

Join IDEXX's Molecular Analytics and Bioanalytical Research and Instrumentation Center (BRIC) at the intersection of immunology and antibody science — where deep knowledge of the immune system directly drives the development of diagnostic products used by veterinarians worldwide. As a Principal Scientist, you will apply expertise spanning adaptive immunity, antibody biology, and biophysical characterization across a portfolio unmatched in the industry, working with cross-functional teams to advance candidates from immunological concepts to characterized lead.

This role sits at the intersection of immunology and antibody science. As a Principal Scientist within the Molecular Analytics and BRIC team, you will work cross-functionally to translate deep immunological insight into high-quality antibody candidates — advancing novel targets from concept to characterized lead. Your expertise in adaptive immunity, biophysical characterization, and single-cell platforms will shape how IDEXX discovers and develops reagents at scale, with direct and lasting impact on animal health globally.

• You will leverage automated single-cell biology platforms and deep understanding of B cell activation, affinity maturation for high-throughput screening, and selection of high-quality antibody candidates against novel targets.
• You will apply humoral immunology knowledge, including antibody isotypes, Fc effector biology, T cell help, and antigen presentation, to guide candidate antibody generation and selection.
• You will engineer multi-format antibody molecules:
  IgG, Fab, nanobodies, and scFv; leveraging yeast and phage display platforms.
• You will lead biophysical characterization (BLI, SPR), develop ability assessments, epitope mapping, evaluate binding kinetics, stability, and sequence liabilities, executing optimization campaigns via site-directed mutagenesis and structure-guided engineering.
• You will provide technical leadership within cross-functional teams, author technical reports, design history files, and laboratory notebooks.

• Ph.D. in Immunology, Biochemistry, Molecular Biology, Biophysics, or related field with 5–7 years of industry/academia experience
• Deep understanding of adaptive immunity: B and T cell biology, humoral immune responses, and antibody affinity maturation
• Proven experience in antibody engineering (IgG, Fab, nanobodies, and scFv), biophysical characterization, and lead optimization
• Hands-on expertise in biophysical methods and molecular biology skills including cloning and mammalian expression systems
• Multi-species antibody experience is a significant advantage
• Experience with automated single-cell biology platforms for high-throughput antibody screening and functional cell profiling
• Strong planning, execution, decision-making, and problem-solving skills with a demonstrated ability to drive complex projects to completion
• Excellent written and verbal communication; demonstrated ability to lead and influence cross-functional teams

What you can expect from us:

• Salary range starting at $125,000 based on experience
• Opportunity for annual cash bonus
• Health / Dental / Vision Benefits Day-One
• 5% matching 401k
• Additional benefits including but not limited to financial support, pet insurance, mental health resources, volunteer paid days off, employee stock program, foundation donation matching, and much more

If you're looking for a role that'll challenge you, offer a variety of work and learning, while helping an amazing industry, we'd love to hear from you!

We're proud of the work we do, because our work matters. An innovation leader in every industry we serve since 1983, our team members help pet owners worldwide keep their companion animals healthy and happy, ensure safe drinking water for billions, and help farmers protect livestock and poultry from disease.

We have customers in over 175 countries and a collaborative global workforce. Our culture embraces challenges and encourages learning and discovery. At IDEXX, you'll be supported by competitive compensation,…