# Mario Schlosser

> Mario Schlosser is a German-born entrepreneur and computer scientist based in New York. The co-founder and former CEO of Oscar Health became advisor to its CEO in June 2026 and remains a director. He previously co-founded Vostu, co-authored the EigenTrust paper, and joined Duolingo’s board in 2024. His public writing explores programming, AI, and his long-running practice of recording his time.

- **Role:** Co-Founder & Advisor to the CEO at Oscar Health
- **Organizations:** Oscar Health, Vostu, Duolingo, Bridgewater Associates, McKinsey & Company, Stanford University
- **From:** Hochheim am Main, Germany
- **Nationality:** German
- **Education:** Computer science degree, with highest distinction, University of Hannover, MBA, Harvard Business School
- **Known for:** Co-founded Oscar and led it as CEO through April 2023., Co-authored the 2003 EigenTrust paper, recognized with the 2019 Seoul Test of Time Award., Co-founded Vostu and led analytics and game design.

## Career timeline

- **1997** — Won fourth prize at the Jugend forscht national final with a camera-equipped data helmet.
- **2002** — Visiting researcher in computer science at Stanford.
- **2003** — Co-authored the EigenTrust paper with Sepandar Kamvar and Héctor Garcia-Molina.
- **2007** — Earned an MBA from Harvard Business School; Vostu launched as a social networking venture.
- **2007-2010** — Senior Investment Associate at Bridgewater Associates; developed analytical trading models.
- **2012** — Co-founded Oscar with Joshua Kushner and Kevin Nazemi.
- **2019** — EigenTrust co-authors received the Seoul Test of Time Award.
- **2023** — Moved from Oscar CEO to president of technology, effective April 3.
- **2024** — Duolingo announced his appointment in June; board service began in July.
- **2026** — Became Co-Founder & Advisor to the CEO at Oscar effective June 1, remaining a director.

## Achievements

- Co-founded Oscar and led it as CEO through April 2023.
- Co-authored the 2003 EigenTrust paper, recognized with the 2019 Seoul Test of Time Award.
- Co-founded Vostu and led analytics and game design.
- Appointed an independent Duolingo director in 2024.

## Latest updates

- **2026-06** — Published Simulating the World Cup in Church on June 18, linking an interactive model at marioschlosser.org/worldcup.
- **2026-06** — Transitioned to Co-Founder & Advisor to the CEO at Oscar effective June 1; remained a director.
- **2026-01** — Published Claude Code for Self-Coaching on January 9, describing a 56,000-row activity archive and agent-assisted analysis.

## Links

- Website: https://marioschlosser.org/
- LinkedIn: https://www.linkedin.com/in/mario-schlosser
- Twitter/X: https://x.com/mariots

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Profile page: https://yespress.io/mario-schlosser
Published by YesPress — https://yespress.io
Last updated: 2026-10-16