Principal Scientist, Biomarker Bioanalytical Sciences

About This Role The Biomarkers and Systems Biology group is seeking a highly motivated Principal Scientist to contribute to the development and implementation of biomarker and bioanalytical strategies supporting discovery, translational, and clinical-stage programs. The successful candidate will serve as a Bioanalytical Lead for assigned programs, providing scientific leadership for assay development, analytical validation, CRO oversight for sample analysis and data interpretation to support critical development decisions. This role will partner closely with various internal and external functions to ensure the generation and interpretation of high-quality bioanalytical and biomarker data supporting clinical development and regulatory submissions. The ideal candidate brings expertise in biomarker and protein-based assay development, experience managing external bioanalytical activities, strong scientific leadership, and the ability to translate biological questions into fit-for-purpose analytical strategies. What You’ll Do Serve as the bioanalytical representative on assigned discovery and development programs, providing scientific expertise and contributing to biomarker and bioanalytical strategies aligned with program objectives. Develop and execute fit-for-purpose bioanalytical approaches (PK, ADA) and support the implementation of Biomarker methods (TE, PD, Disease) supporting the biomarker strategy. Lead the design and execution of assay development, analytical validation, and sample analysis plans that support program and regulatory needs. Provide scientific oversight of CROs and external laboratories, including assay development, validation, sample analysis, troubleshooting, data review, and vendor management. Review protocols, validation reports, sample analysis reports, and bioanalytical data packages to ensure scientific quality, regulatory compliance, and fitness-for-purpose. Support investigation of assay-related issues, deviations, and root cause analyses, providing scientific recommendations for corrective actions. Develop, optimize, transfer, and validate bioanalytical and biomarker assays on various platforms on existing and emerging analytical platforms. Evaluate and implement novel biomarker technologies, assessing platform performance and suitability based on context of use. Monitor assay performance, data quality, QC trends, robustness, and cross-study comparability throughout the assay lifecycle, ensuring data integrity and scientific rigor. Interpret bioanalytical data and communicate findings, risks, and recommendations to project teams and functional stakeholders. Contribute scientific content and data packages supporting IND, CTA, BLA, and other regulatory submissions. Support audits and inspections through preparation and review of bioanalytical documentation and study records. Contribute to scientific publications, conference presentations, and the advancement of best practices in biomarker sciences, bioanalysis, and CRO management Who You Are You are a scientifically rigorous bioanalytical expert who thrives on developing, qualifying, and implementing biomarker, pharmacodynamic, translational, and target engagement assays supporting discovery through clinical development. You are motivated by driving high‑quality, clinically relevant bioanalysis and immunogenicity strategy, and you excel at interpreting data in a cross‑functional, fast‑paced environment. You enjoy partnering with internal teams and CROs, providing clear scientific direction, and ensuring assays meet regulatory and program needs. You communicate clearly, work independently, and bring strong judgment to problem‑solving, regulatory interactions, and strategic decision‑making. Required Skills PhD or MS in Immunology, Cellular and Molecular Biology, or a related scientific field. PhD with 5+ years of relevant industry experience MS with 8+ years of relevant industry experience Experience developing and implementing biomarker and bioanalytical assays across discovery and clinical development settings. Advanced technical expertise in method development and validation in a regulated environment Experience supporting sample analysis and data review. Familiarity with biomarker and bioanalytical requirements supporting regulatory filings and clinical development programs. Experience contributing bioanalytical content to IND, CTA, BLA, and other regulatory submissions. Experience providing scientific oversight of CROs and external laboratory partners. Excellent technical writing, analytical interpretation, and communication skills. Ability to work independently and effectively influence cross‑functional teams in a matrixed environment. Strong verbal and written communication skills with the ability to tailor presentations to diverse audiences. Highly flexible, results‑oriented, and comfortable operating in a fast‑paced, dynamic environment. Proficiency with ligand‑binding and cell‑based assay technologies across multiple platforms. Industry experience in biomarker sciences, translational research, or bioanalytical sciences supporting drug development programs. Preferred skillsExperience supporting clinical biomarker programs. Strong publication and scientific communication record. Experience authoring and defending bioanalytical content for IND, CTA, BLA, MAA, and other global regulatory submissions. Job Level: ManagementAdditional InformationThe base compensation range for this role is: $141,000.00-$188,000.00Base salary offered is determined through an analytical approach utilizing a combination of factors including, but not limited to, relevant skills & experience, job location, and internal equity.Regular employees are eligible to receive both short term and long-term incentives, including cash bonus and equity incentive opportunities, designed to reward recent achievements and recognize your future potential based on individual, business unit and company performance. In addition to compensation, Biogen offers a full and highly competitive range of benefits designed to support our employees’ and their families physical, financial, emotional, and social well-being; including, but not limited to:Medical, Dental, Vision, & Life insurancesFitness & Wellness programs including a fitness reimbursement Short- and Long-Term Disability insuranceA minimum of 15 days of paid vacation and an additional end-of-year shutdown time off (Dec 26-Dec 31)Up to 12 company paid holidays + 3 paid days off for Personal Significance 80 hours of sick time per calendar yearPaid Maternity and Parental Leave benefit 401(k) program participation with company matched contributionsEmployee stock purchase plan Tuition reimbursement of up to $10,000 per calendar year Employee Resource Groups participationWhy Biogen?We are a global team with a commitment to excellence, and a pioneering spirit. As a mid-sized biotechnology company, we provide the stability and resources of a well-established business while fostering an environment where individual contributions make a significant impact. Our team encompasses some of the most talented and passionate achievers who have unparalleled opportunities for learning, growth, and expanding their skills. Above all, we work together to deliver life-changing medicines, with every role playing a vital part in our mission. Caring Deeply. Achieving Excellence. Changing Lives.At Biogen, we are committed to building on our culture of inclusion and belonging that reflects the communities where we operate and the patients we serve. We know that diverse backgrounds, cultures, and perspectives make us a stronger and more innovative company, and we are focused on building teams where every employee feels empowered and inspired. Read on to learn more about Biogen.All qualified applicants will receive consideration for employment without regard to sex, gender identity or expression, sexual orientation, marital status, race, color, national origin, ancestry, ethnicity, religion, age, veteran status, disability, genetic information or any other basis protected by federal, state or local law. Biogen is an E-Verify Employer in the United States.SummaryLocation: Cambridge, MAType: Full time