Head of Biodefense

Posted Yesterday
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San Francisco, CA, USA
In-Office
Senior level
Biotech • Generative AI
The Role
Lead and build Radical Numerics' biosecurity function: set strategy across detection, surveillance, and countermeasures; translate model capabilities into operational products; engage governments and global stakeholders; drive partnerships, hiring, and external communications; and operate with high ownership in ambiguous, high-stakes environments.
Summary Generated by Built In
About Us


Radical Numerics is an AI research lab building general biological intelligence. Our mission is to master the code of life, and our purpose is to reduce human suffering.

Our team created Evo, and started the field of generative genomics. Our work was featured on the cover of Science, and presented by our CEO on the main stage of TED2025. Evo was used to create the first AI gene therapy tool CRISPR-Cas9, and the first AI whole genome from scratch. Evo 2, featured in Nature, is the largest fully open source AI project across any domain.

Radical Numerics is bringing the rigor of distributed systems, model architecture, and numerics research to the challenges of biology. We’ve redesigned the foundation model training stack to turn the world’s raw scientific data (e.g. biological sequences, experiments, and physical processes), into intelligible, generative models that can expand and accelerate what humanity can understand, design, and cure.

The same generative breakthroughs that enable life-saving cures also lowers the barrier to creating engineered threats and AI-generated bioweapons. We believe these forces are inseparable. Radical Numerics was founded to develop both the power to design and the responsibility to defend.

About the Role

As Head of Biosecurity, you will help define and build Radical Numerics’ biosecurity efforts from the ground up. You will work across strategy, product, and partnerships to turn frontier biological AI capabilities into real-world systems for detection, surveillance, and response.

This is a high-ownership role with significant growth potential. You will work directly with leadership to shape the direction of our biosecurity platform, engage with government and global stakeholders, and help build the team and ecosystem around this work.

This role is ideal for someone who combines strong technical or domain intuition with the ability to operate in ambiguous, high-stakes environments, and who is excited to grow into a senior leadership position over time.

What You'll Do
Shape Biosecurity Strategy
  • Help define Radical Numerics’ approach to biosecurity across detection, surveillance, and countermeasures.

  • Develop clear views on how capabilities from models like Omnii translate into real-world risks and how to mitigate them.

  • Contribute to the company’s positioning in global biosecurity and AI safety conversations.

Drive Product Direction
  • Work with research and engineering teams to define requirements for biosecurity systems (e.g., pathogen detection, sequence risk scoring, biosurveillance platforms like Omnii).

  • Translate technical capabilities into practical tools used by labs, governments, and institutions.

  • Ensure systems are aligned with real-world workflows and user needs.

Build Relationships & Partnerships
  • Engage with government agencies, national labs, and global health organizations.

  • Help initiate and support collaborations, pilots, and deployments.

  • Act as a key interface between Radical Numerics and the broader biosecurity ecosystem.

Contribute to External Leadership
  • Help communicate capabilities, risks, and safeguards of biological AI systems.

  • Participate in conversations around biosecurity, AI governance, and global health.

  • Build credibility and trust with external stakeholders.

Help Build the Biosecurity Function
  • Support hiring efforts across biosecurity, ML, and related roles.

  • Help identify and engage high-level advisors in biodefense, policy, and science.

  • Contribute to shaping how the biosecurity team evolves as the company grows.

Execute in Ambiguous Environments
  • Identify opportunities quickly and drive them forward, from early conversations to deployed systems.

  • Operate with high agency in a fast-moving, evolving space.

What We're Looking For
  • Strong interest or background in biosecurity, biodefense, global health, or adjacent fields.

  • Ability to reason clearly about biological risk, even in areas where frameworks are still emerging.

  • Experience or exposure to AI, computational biology, or biological data systems.

  • Strong communication skills and ability to engage with external stakeholders.

  • Demonstrated ability to take ownership and drive projects independently.

  • Comfort operating in ambiguity and learning quickly.

Nice to Have
  • Existing network across biosecurity, government, or global health communities.

  • Experience with pathogen genomics, biosurveillance, or related areas.

  • Exposure to AI safety, model evaluations, or dual-use risk frameworks.

  • Familiarity with biological foundation models or computational biology tools.

Why Radical Numerics
  • Help define how the world detects and defends against biological threats in the age of AI.

  • Work on frontier systems like Omnii that push the boundaries of what’s possible in biology.

  • Build new categories of biosecurity infrastructure from first principles.

  • Join early and grow into a leadership role shaping a mission-critical domain.

Radical Numerics is committed to equal employment opportunity and does not discriminate in any employment opportunities or practices based on an individual's race, color, creed, gender (including gender identity and gender expression), religion (all aspects of religious beliefs, observance or practice, including religious dress or grooming practices), marital status, registered domestic partner status, age, national origin or ancestry (including language use restrictions and possession of a driver’s license issued under California Vehicle Code section 12801.9), natural hair, physical or mental disability, political affiliation, medical condition (including cancer or a record or history of cancer, and genetic characteristics), sex (including pregnancy, childbirth, breastfeeding or related medical condition), genetic information, sexual orientation, military and veteran status or any other consideration made unlawful by federal, state, or local laws. It also prohibits unlawful discrimination based on the perception that anyone has any of those characteristics, or is associated with a person who has or is perceived as having any of those characteristics.
Radical Numerics participates in E-Verify and will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.

Skills Required

  • Background or strong interest in biosecurity, biodefense, global health, or adjacent fields.
  • Ability to reason clearly about biological risk and emerging frameworks.
  • Experience or exposure to AI, computational biology, or biological data systems.
  • Strong communication skills and ability to engage external stakeholders (government, labs, global health organizations).
  • Demonstrated ability to take ownership and drive projects independently.
  • Comfort operating in ambiguous, fast-moving environments and ability to learn quickly.
  • Existing network across biosecurity, government, or global health communities.
  • Experience with pathogen genomics, biosurveillance, or related applied areas.
  • Exposure to AI safety, model evaluations, or dual-use risk frameworks.
  • Familiarity with biological foundation models or computational biology tools.
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The Company
HQ: San Francisco, California
25 Employees

What We Do

The architectures that power modern AI were designed for language, not for science. They were never built to understand DNA, interpret experiments, or learn the rules that govern living systems. Closing this gap represents one of the defining opportunities of our time. Our team has pioneered advances across frontier AI, including the first models trained with one-million-token context windows, and now scaling toward one billion. We focus on innovations on systems and architecture, because building AI for science demands a fundamentally different foundation. As a first application of this technology engine, we are advancing AI for life, the most complex and consequential domain of all. We are the AI team behind Evo and Evo 2, the generative genomics models used to create real gene-editing tools and the first whole genomes designed entirely by AI. That work demonstrated that AI can create biology, not just analyze it. We are now building multimodal models trained directly on the fabric of biology, enabling faster discovery, deeper understanding, and entirely new capabilities. As we push the frontier of general biological intelligence, we will build systems hand-in-hand to ensure global biological resilience: rapid detection, rapid response, and rapid countermeasures against emerging threats, both natural and synthetic. Our mission is ambitious: to reimagine what AI can do for biology, and to build that future. Our advisors include Eric Horvitz, CSO of Microsoft, Chris Ré of Stanford, George Church of Harvard, and Andrew Weber, former Assistant Secretary of Defense for Nuclear, Chemical and Biological Defense Programs.

Why Work With Us

We bring the rigor of distributed systems, model architecture, and numerics research to the hard problems of scaling learning on biological data. If this resonates, we'd love to hear from you.

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