Remote Certifying Scientist – Toxicology (LC-MS/​MS Data Review)

About the Role

We are seeking a dedicated Remote Certifying Scientist specializing in Toxicology to join Ethos Holding Corp. In this role, you will be responsible for the analytical review and verification of LC-MS/MS toxicology data, ensuring the highest standards of quality and compliance. As a Remote Certifying Scientist, you will play a crucial role in maintaining analytical integrity and supporting our commitment to excellence in the healthcare sector.

What You'll Do

• Perform detailed reviews of LC-MS/MS analytical data for toxicology confirmation assays.
• Evaluate calibration curves, system suitability, and batch acceptance criteria.
• Review quality control performance and verify compliance with established acceptance limits.
• Assess chromatographic peak integrity, integration accuracy, and signal quality.
• Confirm retention time alignment and ion transition performance according to validated methods.
• Identify analytical anomalies including interferences, carryover, poor peak shape, or integration errors.
• Document analytical findings and exceptions clearly within laboratory systems.
• Communicate analytical review outcomes with certifying scientists and laboratory personnel.
• Participate in ongoing training related to LC-MS/MS toxicology, drug metabolism, and analytical best practices.
• Maintain awareness of evolving forensic and clinical toxicology standards.

Requirements

• BS, MS, or PhD in Chemistry, Toxicology, Pharmacology, Biochemistry, or related analytical science.
• Demonstrated experience interpreting LC-MS/MS or GC-MS/MS data.
• Strong understanding of drug metabolism and toxicology principles.
• Experience reviewing calibration curves, QC performance, and chromatographic data.
• High level of attention to analytical detail and data integrity.

Nice to Have

• Experience in a laboratory setting focused on toxicology.
• Familiarity with laboratory information management systems (LIMS).
• Knowledge of regulatory compliance in toxicology.

What We Offer

• Fully remote position with flexible working hours.
• Opportunity for ongoing training and professional development.
• Contribute to critical quality checkpoints within laboratory workflows.
• Engage in continuous quality improvement initiatives.
• Collaborative and supportive team environment.