Fundraising Fox

Isaac Tolley

Founder

Founder at Juno

San Francisco, California, United States

FoundedJuno · YC

About

Isaac Tolley studied molecular biology at UCL and has worked as a neuroscience researcher at UCL. He previously founded or led protein engineering work at Mimotype and built medical chatbot systems for the NHS, roles that inform his current position as co-founder and CTO at Juno.

Founder at JunoYC X26

Intro paths

YC

Isaac went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was David Lieb, General Partner at Y Combinator — the partner who ran Juno's batch and knows the company first-hand. YC profile ↗

In turn, Isaac can intro founders to Juno's investors below.

Co-founders at Juno

Experience

  1. Juno (YC P26)Co-Foundercurrent2025 — presentLondon Area, United Kingdom
  2. Founders, Inc.Fellow2026
  3. Mimotype Technologies GmbHFounder's Associate2025
  4. SharedGenesCo-Founder2025
  5. Innovation ForumProject Manager2024 — 2025
  6. BrightdaleFellow2024 — 2025Berlin, Germany
  7. PutnamSummer Associate Consultant2024
  8. GSKResidential Biologist2023
  9. Windrose Consulting GroupLife Sciences Analyst2023Greater London, England, United Kingdom
  10. UCLResearcher2022Greater London, England, United Kingdom
  11. iGEMProject Lead2019 — 2020
  12. UK Dementia Research InstituteResearcher2020

Skills & more

  • Grade 8 ViolinABRSM

From Isaac's professional profile.

Frequently asked questions

Who is Isaac Tolley?
Isaac Tolley studied molecular biology at UCL and has worked as a neuroscience researcher at UCL. He previously founded or led protein engineering work at Mimotype and built medical chatbot systems for the NHS, roles that inform his current position as co-founder and CTO at Juno.
Where does Isaac Tolley work?
Isaac Tolley is Founder of Juno.
What companies did Isaac Tolley found?
Isaac Tolley founded Juno.
Where did Isaac Tolley go to school?
Isaac Tolley studied at Y Combinator; UCL (MSc, Bioscience Innovation and Enterprise); UCL (BSc, Biochemistry (Molecular Biology)).

Founder mafias

Y Combinator mafia8,773

Also came through, then founded or led a company.

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Y Combinator mafia4,716

Also came through, then founded or led a company.

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UCL mafia117

Also came through, then founded or led a company.

+ 110 more

Founders mafia19

Also came through, then founded or led a company.

+ 12 more

City of London School mafia2

Also came through, then founded or led a company.

Same school

Shared employers