Charles River Laboratories is seeking a Research Scientist to join our Laboratory Sciences group within our Safety Assessment site located in Shrewsbury, MA. The incumbent will serve as a scientific team member in the conduct of preclinical and clinical research studies at all levels of complexity. Responsibilities include study management, interpretation, and reporting of study data and assuring the regulatory compliance of these projects, as appropriate. Additional responsibilities include serving as a Principal Investigator for the development and validation of biomarker, PK and ADA assays (eg: ligand binding assays, enzymatic assays, Luminex, Bioplex, MSD, Quanterix, ProteinSimple). This individual would be responsible for the composition and execution of validation and sample analysis protocols/plan in accordance with company standard operating procedures and industry regulatory guidelines. This position will serve as the primary scientific contact for key clients and the on-site support of their programs.