Description

SystImmune is a leading and well-funded clinical-stage biopharmaceutical company located in Redmond, WA and Princeton, NJ. It specializes in developing innovative cancer treatments using its established drug development platforms, focusing on bi-specific, multi-specific antibodies, and antibody-drug conjugates (ADCs). SystImmune has multiple assets in various stages of clinical trials for solid tumor and hematologic indications. Alongside ongoing clinical trials. SystImmune has a robust preclinical pipeline of potential cancer therapeutics in the discover and IND-enabling stages, representing cutting-edge biologics development. We offer an opportunity for you to learn and grow while making significant contributions to the company's success.

We are seeking a Principal Scientist to provide technical leadership for the development of immunohistochemistry (IHC) companion diagnostics supporting oncology drug programs. This individual will serve as a subject matter expert responsible for CDx assay strategy, analytical validation, and clinical implementation from early feasibility through regulatory submission and commercialization readiness.

The Principal Scientist will lead complex CDx IHC development initiatives, ensure compliance with global regulatory and quality standards, and influence biomarker strategy through deep technical expertise. This is a hands‑on scientific leadership role requiring strong collaboration with pathology, translational science, regulatory, clinical development, and external diagnostic partners to ensure successful CDx execution aligned with therapeutic timelines.

This position is full-time onsite at our Redmond, WA location.

Responsibilities
CDx IHC Kit Development & Strategy

Lead development of IHC-based CDx assays and kits from early feasibility through IVD readiness.
Define assay design, platform selection, and development strategy aligned with CDx regulatory expectations.
Oversee antibody selection, assay optimization, and standardization across platforms (e.g., Ventana, Dako, Leica).
Guide development of scoring algorithms, cut-offs, and interpretation frameworks with pathology leadership.

Analytical Validation & Design Control

Lead analytical validation strategy and execution for CDx IHC assays, including sensitivity, specificity, precision, accuracy, and robustness.
Ensure validation activities meet regulatory expectations and are conducted under design control.
Oversee preparation and approval of validation protocols, reports, and technical documentation.
Ensure traceability, risk management, and documentation in compliance with QSR 820 and ISO 13485.

Clinical & CDx Implementation

Principal Scientist, CDx IHC Development

Description

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