Scientist, In Vitro​/Ex Vivo

Scientist, In Vitro / Ex Vivo Position Summary

The Scientist – In Vitro / Ex Vivo supports the design, execution, and analysis of complex in vitro and ex vivo studies, with a primary focus on flow cytometry–based assays. This role requires strong technical expertise, attention to detail, and the ability to collaborate across functional teams and sites to deliver high‑quality, reproducible data in support of internal development and client programs.

The ideal candidate demonstrates both technical proficiency and sound scientific judgment, including the ability to troubleshoot assays, interpret data, and clearly communicate results in a fast‑paced, client‑driven environment. This position plays a key role in ensuring data integrity, operational efficiency, and scientific excellence within the In Vitro team.

This role is based fully onsite at our Boulder, CO site.

• Design, develop, optimize, and execute flow cytometry–based assays for in vitro and ex vivo studies
• Perform routine and complex laboratory procedures, including:
  • Multicolor flow cytometry panel design and optimization
  • Sample processing and cell handling (human and/or animal tissues)
  • Immunophenotyping and functional assays
  • Data acquisition, analysis, and interpretation using flow cytometry software (e.g., Flow Jo, Cyto Scribe)
• Support the development and refinement of standard operating procedures (SOPs) and assay workflows
• Troubleshoot technical issues and implement corrective actions to ensure reliable data generation
• Maintain accurate and complete experimental records in accordance with company and regulatory requirements
• Collaborate with cross-functional teams (Operations, Project Management, Scientific Leadership) to meet study timelines and deliverables
• Communicate results clearly through written reports, data summaries, and internal or client‑facing discussions
• Ensure compliance with applicable quality standards and internal quality systems
• Participate in the training and mentoring of junior staff, as appropriate
• Contribute to the continuous improvement of laboratory processes, workflows, and scientific capabilities

• Bachelor’s or Master’s degree in Immunology, Biology, Cell Biology, or a related life sciences field
• 4+ years of hands‑on laboratory experience in flow cytometry and cell‑based assays (level may be adjusted based on experience)
• Demonstrated experience operating flow cytometry instrumentation and analyzing complex datasets
• Strong understanding of immunology, cell biology, and assay design principles
• Strong organizational skills and attention to detail
• Ability to manage multiple priorities and meet deadlines in a fast‑paced environment
• Effective written and verbal communication skills
• Experience with analysis software (Prism, Flow Jo, Cyto Scribe) and Microsoft Office (Word, Excel, PowerPoint, Outlook);
  Smartsheet experience is a plus

• Ph.D. in Immunology, Biology, Cell Biology, or a related life sciences field
• Experience working in a contract research organization (CRO) or other client‑facing environment
• Experience working with tissues from a variety of species (human, non‑human primate, murine, rat)
• Experience contributing to SOP development and/or method validation
• Experience training or mentoring laboratory staff

• Demonstrated scientific rigor with strong attention to detail and commitment to data quality and integrity
• Strong problem‑solving and troubleshooting skills, with the ability to interpret results and identify effective solutions
• Excellent written and verbal communication skills, with the ability to clearly convey technical information
• Ability to work independently and collaboratively within a team environment and interact effectively with scientific staff at all levels
• High level of accountability and reliability, with the ability to manage responsibilities and meet deadlines in a dynamic environment
• Adaptability and flexibility to respond to changing priorities and operational needs

• Ability to work in a laboratory environment for extended periods
• Ability to lift and move laboratory materials and…