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Jon Cefalu

Founder

Cofounder at Preamble

Los Angeles Metropolitan Area

FoundedPreamble

Find your path to Jon

809 people in our graph share verified history with Jon — schools, employers, funds. One of them is your warm intro.

Paul KwanunlockedJon: together at Stanford University (2008–2012)
×11Jon: together at Stanford University

Cofounder at Preamble

Intro paths

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In turn, Jon can intro founders to Preamble's investors below.

Preamble's investors · 1

Trousdale VenturesWest Hollywood · $1M – $5M checks · since 2021

Co-founders at Preamble

J
JeremyFounder

Experience

  1. Circadia HealthLead AI Engineercurrent2025 — present
  2. PreambleCo-Founder / Chief Product Officer / Lead ML Eng (Red Team)2021 — 2025
  3. PromptArmor (YC W24)LLM Threat Intel2024
  4. Campaign for Peace, Disarmament, and Common SecurityML Research Lead (DISARM:SIMC4)2019 — 2024
  5. Buildnow AIML Advisor, Backer2024
  6. Snap Inc.Co-Founder of Snap Lab / Advanced Technology Lead2014 — 2021
  7. Vergence LabsCo-Founder / Chief Science Officer2011 — 2014

Skills & more

Information SecurityPython (Programming Language)Machine LearningLarge Language Models (LLM)Artificial Intelligence (AI)EntrepreneurshipRoboticsManufacturingAugmented RealityElectrical EngineeringAltiumPython
+1 moreGenetic Engineering

From Jon's professional profile.

Frequently asked questions

Who is Jon Cefalu?
Cofounder at Preamble
Where does Jon Cefalu work?
Jon Cefalu is Cofounder of Preamble.
What companies did Jon Cefalu found?
Jon Cefalu founded Preamble.
Where did Jon Cefalu go to school?
Jon Cefalu studied at Stanford University (B.S., Computer Science with Honors).

Founder mafias

Same school

Shared employers