Mark Hatfield
InvestorFounder & Partner at Ten Eleven
Boston, Massachusetts
Writes $3M β $15M checks Β· typically $9M
About
Mark Hatfield, a Founder and General Partner and one of the original specialist cybersecurity VCs, is a frequently cited authority on protecting AI/ML models from data poisoning and adversarial attacks.
Invests in
AI & Machine LearningCrypto & Web3CybersecurityData & InfrastructureFintech
Experience
- Ten Eleven VenturesFounder and Partnercurrent2014 β present
- furlBoard Member and Investorcurrent2026 β present
- VulnCheckBoard Member and Investorcurrent2025 β present
- HypernativeBoard Member and Investorcurrent2025 β present
- DarkhiveBoard Member and Investorcurrent2024 β present
- AembitBoard Member and Investorcurrent2023 β present
- SemperisInvestorcurrent2022 β present
- NetSPIInvestorcurrent2021 β present
- ReliaQuestBoard Member, Investorcurrent2020 β present
- ImmutaInvestorcurrent2020 β present
- KasadaInvestorcurrent2020 β present
- Cado SecurityBoard Member, Investor2020 β 2025London, England, United Kingdom
- Vulcan CyberBoard Member, Investor2019 β 2025Israel
- Noetic CyberBoard Member, Investor2021 β 2024
- DarktraceInvestor2016 β 2024
- Axis SecurityInvestor2020 β 2023
- CyberGRXBoard Member, Investor2016 β 2023
- Digital ShadowsInvestor2015 β 2022
- KnowBe4Investor2019 β 2021
- BLACKHORSE SOLUTIONS, INC (BH)Board Member, Investor2017 β 2021
Education
- McMaster University
- York University
Skills & more
From Mark's professional profile.
Same school
Also attended McMaster University65
+ 59 more
Also attended York University44
+ 38 more
Shared employers
Also worked at Immuta7
+ 1 more
Also worked at Vulcan Cyber9
+ 3 more
Also worked at CyberGRX4
Also worked at BLACKHORSE SOLUTIONS, INC (BH)3
Deals Β· 5
Fleet Device Management Inc.Board seat
via Ten Eleven Β· filed Jul 2025 Β· $27.9M raise
Aembit, Inc.Board seat
via Ten Eleven Β· filed Jul 2024 Β· $25M raise
HiddenLayer, Inc.Board seat
via Ten Eleven Β· filed Feb 2024 Β· $50.2M raise
JASK Autonomous Security PlatformBoard seat
via Ten Eleven Β· filed Oct 2019 Β· $34M raise
Cyber Global Risk ExchangeBoard seat
via Ten Eleven Β· filed Apr 2017 Β· $20M raise
Attribution from SEC filings, press coverage, and firm rosters.
Colleagues at Ten Eleven
Network1
Investors connected to Mark in public investor directories β a warm-intro map.













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