Infectious Disease Medical Science Liaison

Karius is a life science, venture-backed clinical metagenomics company, focused on elevating patient care through microbial insights. We are committed to advancing diagnostic science and technology to optimize the diagnosis and treatment of infectious diseases. Through the use of genomics and AI, we are driven to improve the diagnostic landscape for infectious diseases. We are looking for an outstanding Medical Science Liaison (MSL) to join our commercial team in a role that blends scientific expertise with commercial impact. Unlike traditional MSL positions, this role is fully embedded within the commercial organization and carries a shared sales goal alongside the Clinical Sales Manager (CSM). The company’s platform is already delivering unprecedented insights into the microbial landscape, providing clinicians with a comprehensive test capable of identifying more than a thousand pathogens directly from blood, and helping industry accelerate the development of therapeutic solutions. The products Karius offers today are some of the most advanced solutions available to physicians who aim to deliver better care to many otherwise ineffectively treated patients. Director, Medical Science Liaison

This posting represents a general opportunity for prospective roles within the sales organization. Deliver clinical and scientific expertise in customer-facing engagements to drive demand, remove barriers to adoption, and position the Karius tests as critical diagnostic tools.

• Engage with a broad range of stakeholders (physicians, pharmacists, nurses, lab directors, infection control) to identify champions, shape decision-making, and support test integration into clinical workflows and protocols.
• Partner with marketing and training to identify content needs, develop impactful messaging, and refine tools based on real-world feedback and clinical insights.
• Establish and grow Centers of Excellence by helping sites achieve optimal clinical use of the Karius tests—then leveraging those models to influence broader market adoption.
• Gather and relay field insights that shape commercial strategy, product positioning, and cross-functional initiatives.
• Stay current on clinical and scientific developments in infectious disease diagnostics and translate those insights into actionable strategies for field teams and customers.
• Represent Karius at conferences and professional meetings to build brand visibility, develop customer relationships, and capture feedback from key voices in the field.

Travel:

Travel required up to 70%.

Work is generally performed in the field which requires the ability to extensively travel.

Clinical experience with hematology/oncology, infectious disease, transplant, intensive care preferred.

• Understanding of microbiology/virology, common diagnostic modalities (PCR, culture methods, serologies) required.
• Knowledge of medical and laboratory structure and hierarchy required.
• Knowledge of laboratory workflow and fiscal operations, a plus.
• Personal Qualifications
• Ability to present technical information to audiences with various degrees of scientific and clinical expertise.
• Unquestionable personal code of ethics, integrity, confidentiality and ability to build trusting and professional relationships.
• At Karius, we value a diverse and inclusive workplace and provide equal employment opportunities for all applicants and employees and are committed to honor and invest in the full diversity of people, in our hiring, recruiting and development of employees across the Company.

All qualified applicants for employment are encouraged to apply and will be considered without regard to an individual’s race, color, sex, gender identity and gender expression (including transgender individuals who are transitioning, have transitioned, or are perceived to be transitioning to the gender with which they identify), religion, age, national origin or ancestry, citizenship, physical or mental disability, medical condition, family care status, marital status, domestic partner status, sexual orientation, genetic information, military or veteran status, or any other basis protected by federal, state or local laws. If you are unable to submit your application due to a disability, please contact us at

[and we will accommodate qualified individuals with disabilities.

$Stock options, Commission