Siobhan Mangini – Biography
Last update: February 17, 2026Executive profile
Siobhan was President and Chief Financial Officer at NGM Biopharmaceuticals, and President and Chief Financial Officer at Castlight Health. Siobhan Mangini joined Marathon Health in 2025.
Siobhan Mangini is currentlyPartner, Healthcare Technology and Services at Venrock - View - Venrock org chart
Director at Marathon Health - View - Marathon Health org chart
Director at Virta Health - View - Virta Health org chart
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Education
Siobhan Mangini has a Master of Public Administration from Harvard University - Kennedy School of Government and a Master of Business Administration from Stanford Business School.
They have also studied at Harvard University - Kennedy School of Government :
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They have also studied at Stanford Business School :
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The colleagues of Siobhan Mangini
Company Colleagues
- At Venrock, Siobhan Mangini has 26 colleagues including Brian Ascher (SaaS, Enterprise & AI), Lesley Kelly (Trading)…
- At Marathon Health, Siobhan Mangini has 16 colleagues including Jeff Wells (CEO), Glenn Steele (Director)…
- At Virta Health, Siobhan Mangini has 17 colleagues including Sami Inkinen (CEO & Director), Yvonne Hao (Director)…
Industry Colleagues
- In the Healthcare industry, Siobhan Mangini has 54,683 colleagues in 3,500 companies located in 59 countries. 39,488 executive movements have been recorded in the last 12 months. Learn more about Healthcare.
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