# Thomas M. Siebel

> Thomas M. Siebel is an American software entrepreneur and author who co-founded Siebel Systems and founded C3 AI. His career spans Oracle, the growth of customer relationship management software, and enterprise AI. He is also an education donor whose support includes the Siebel Scholars program and the University of Illinois Urbana-Champaign.

- **Role:** Founder, Chairman and CEO at C3 AI
- **Organizations:** C3 AI, Siebel Systems, Oracle, Gain Technology, Thomas and Stacey Siebel Foundation, Siebel Scholars, Hoover Institution
- **From:** Chicago, United States
- **Nationality:** American
- **Education:** BA, History, University of Illinois Urbana-Champaign, MBA, University of Illinois Urbana-Champaign, MS, Computer Science, University of Illinois Urbana-Champaign
- **Known for:** Co-founded Siebel Systems, a major CRM software business acquired by Oracle in a transaction announced at approximately $5.8 billion., Founded enterprise AI company C3 AI and took it public in 2020., Supported the establishment of the Siebel School of Computing and Data Science with a $50 million gift in 2024.

## Career timeline

- **1984–1990** — Held leadership positions at Oracle.
- **1992** — Gain Technology, where he served as CEO, merged with Sybase.
- **1993** — Co-founded Siebel Systems with Patricia House.
- **2000** — Siebel Scholars program established by the Thomas and Stacey Siebel Foundation.
- **2006** — Oracle completed its acquisition of Siebel Systems on January 31.
- **2009** — Founded C3, later named C3 AI.
- **2011** — Began serving as C3 AI CEO, according to the company’s May 2026 regulatory filing.
- **2019** — Published Digital Transformation: Survive and Thrive in an Era of Mass Extinction.
- **2020** — C3 AI began trading on the NYSE under ticker AI.
- **2024** — A $50 million gift supported the establishment of the Siebel School of Computing and Data Science.
- **2025** — Became executive chairman as Stephen Ehikian became CEO, effective September 1.
- **2026** — Resumed C3 AI CEO duties on May 8; Ehikian became president.

## Achievements

- Co-founded Siebel Systems, a major CRM software business acquired by Oracle in a transaction announced at approximately $5.8 billion.
- Founded enterprise AI company C3 AI and took it public in 2020.
- Supported the establishment of the Siebel School of Computing and Data Science with a $50 million gift in 2024.
- Elected to the American Academy of Arts and Sciences in 2013.
- Elected to the National Academy of Engineering in 2026, as reported by C3 AI.
- Author of four books on business and technology.

## Latest updates

- **2026-09** — C3 AI reported first-quarter fiscal 2027 revenue of $52.4 million, positive free cash flow of $2.1 million, and a non-GAAP operating loss of $36.2 million; Siebel described progress in its turnaround.
- **2026-07** — Appeared with Condoleezza Rice in Hoover’s Only in America series to discuss education, enterprise, and AI.
- **2026-05** — Resumed the CEO role at C3 AI, effective May 8.

## Links

- Website: https://c3.ai/company/leadership
- LinkedIn: https://www.linkedin.com/in/thomassiebel
- Twitter/X: https://x.com/tomsiebel

---

Profile page: https://yespress.io/thomas-m-siebel
Published by YesPress — https://yespress.io
Last updated: 2026-10-21