Thomas M. Siebel
2× unicorn founderFounder at C3 IoT · Founder, Chairman, and CEO at C3
Redwood City, California, United States
FoundedC3 IoT$3.9BC3$1.6B
Find your path to Thomas
427 people in our graph share verified history with Thomas — schools, employers, funds. One of them is your warm intro.
Mark SiegelunlockedThomas: together at Siebel Systems (1990–1994)
×11Thomas: together at Siebel Systems
Founder, Chairman, and CEO at C3
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Founder at C3 IoT
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C3 IoT's investors · 3
Experience
- C3 AIChief Executive Officer and Chairmancurrent2026 — presentRedwood City, California, United States
- C3 AIExecutive Chairman2025 — 2026Redwood City, California, United States
- C3 AIChairman and Chief Executive Officer2011 — 2025Redwood City, CA
- First Virtual GroupChairmancurrent1996 — present
- Siebel SystemsChairman and Chief Executive Officer1993 — 2006
- Gain TechnologyChief Executive Officer1990 — 1992
- OracleSenior Vice President1984 — 1990
Skills & more
LeadershipCRM
From Thomas's professional profile.
Frequently asked questions
- Who is Thomas M. Siebel?
- Executive Officer, Director at C3 IoT
- Where does Thomas M. Siebel work?
- Thomas M. Siebel is Founder of C3 IoT and Founder, Chairman, and CEO at C3.
- What companies did Thomas M. Siebel found?
- Thomas M. Siebel founded C3 IoT, C3.
- Where did Thomas M. Siebel go to school?
- Thomas M. Siebel studied at University of Illinois Urbana-Champaign (Masters of Science, MBA, Ph.D (Honorary) in Engineering, Computer Science); University of Illinois Urbana-Champaign (Bachelor of Arts, History).
Founder mafias
University of Illinois Urbana-Champaign mafia352
Also came through, then founded or led a company.
Max LevchinBSFounded PayPal +2Luke NosekBSFounded PayPalAnsuman SatpathyPhilosophyFounded Santa Ana +4Maria FardisB.S.Founded Iovance +2DeVaris BrownB.S.Founded Super Heroic +2Harish AgarwalB.S.Founded Nori +2
+ 345 more
Same school
Also attended University of Illinois Urbana-Champaign740
Max LevchinCo-founder of PayPal; founder, chairman & CEO of Affirm; partner at SciFi VCLuke NosekCo-founder of PayPal; co-founder of GigafundSundeep PeechuGeneral Partner at Felicis VenturesDeep NisharInvestment Team at General CatalystPrashant ShahPartner at Monta Vista CapitalNoorPartner at Clear Ventures
+ 734 more
Shared employers
Also worked at C3 AI27
Shravan NarayenInvestor at IVP (Institutional Venture Partners)Steve MankoffPartner at TDF VenturesEric BallFounding General Partner at Impact Venture CapitalPete SolvikManaging Director at Jackson Square VenturesWilliam AbecassisManaging Partner and CIO at BravenPhilippe ChambadalVenture Advisor at AI Fund
+ 21 more
Also worked at First Virtual Group1
Also worked at Siebel Systems655
Marc BenioffCo-founder, Chair & CEO of SalesforceAyshaAdvisor at Clear VenturesNatalie VaisInvestor at Spark CapitalMark SiegelPartner Emeritus at Menlo VenturesHope CochranVenture Partner at Madrona Venture GroupMark NelsonVenture Partner at Madrona Venture Group
+ 649 more