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Mark Hatfield

Investor

Founder & Partner at Ten Eleven · Board director at Darkhive · Board director at Fleet Device Management Inc. · Board director at Cyber Global Risk Exchange

Boston, Massachusetts

Writes $3M – $15M checks · typically $9M

Find your path to Mark

547 people in our graph share verified history with Mark — schools, employers, funds. One of them is your warm intro.

Mark RostickunlockedMark: together at Immuta (2020–2026)
Mark: together at Axis Security
Mark: together at Kasada
Mark: together at Darktrace

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.

Contact· self-published, not guessed

Invests in

AI & Machine LearningCrypto & Web3CybersecurityData & InfrastructureFintech

Board director at Darkhive

Intro paths

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In turn, Mark can intro founders to Darkhive's investors below.

Darkhive's investors · 6

Alamo AngelsSan Antonio · since 2026Bison CapitalSanta Monica · $10M checks · since 2026Crosslink CapitalSan Francisco · $1M – $9M checks · since 2026Draper AssociatesSan Mateo · $500K – $5M checks · since 2026MVP VenturesChicagoTen ElevenBurlingame · $3M – $15M checks · since 2024

Co-founders at Darkhive

JGJohn Goodson
John GoodsonExecutive Officer, Director

Board director at Fleet Device Management Inc.

Intro paths

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In turn, Mark can intro founders to Fleet Device Management Inc.'s investors below.

Fleet Device Management Inc.'s investors · 3

Cota CapitalSan Francisco · since 2025CRV (Charles River Ventures)Bay Area · $250K – $5M checks · since 2025Ten ElevenBurlingame · $3M – $15M checks · since 2025

Co-founders at Fleet Device Management Inc.

MMMike McNeil
Mike McNeilExecutive Officer, Director

Board director at Cyber Global Risk Exchange

Intro paths

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In turn, Mark can intro founders to Cyber Global Risk Exchange's investors below.

Cyber Global Risk Exchange's investors · 3

ClearSkyWest Palm Beach · since 2017Scale Venture PartnersSan Francisco · $5M – $25M checks · since 2018Ten ElevenBurlingame · $3M – $15M checks · since 2017

Co-founders at Cyber Global Risk Exchange

FH
Frederick H. KneipChief Executive Officer

Experience

  1. Ten Eleven VenturesFounder and Partnercurrent2014 — present
  2. furlBoard Member and Investorcurrent2026 — present
  3. VulnCheckBoard Member and Investorcurrent2025 — present
  4. HypernativeBoard Member and Investorcurrent2025 — present
  5. DarkhiveBoard Member and Investorcurrent2024 — present
  6. AembitBoard Member and Investorcurrent2023 — present
  7. SemperisInvestorcurrent2022 — present
  8. NetSPIInvestorcurrent2021 — present
  9. ReliaQuestBoard Member, Investorcurrent2020 — present
  10. ImmutaInvestorcurrent2020 — present
  11. KasadaInvestorcurrent2020 — present
  12. Cado SecurityBoard Member, Investor2020 — 2025London, England, United Kingdom
  13. Vulcan CyberBoard Member, Investor2019 — 2025Israel
  14. Noetic CyberBoard Member, Investor2021 — 2024
  15. DarktraceInvestor2016 — 2024
  16. Axis SecurityInvestor2020 — 2023
  17. CyberGRXBoard Member, Investor2016 — 2023
  18. Digital ShadowsInvestor2015 — 2022
  19. KnowBe4Investor2019 — 2021
  20. BLACKHORSE SOLUTIONS, INC (BH)Board Member, Investor2017 — 2021
  21. BLACKHORSE SOLUTIONS, INC (BH)Board Member, Investor2017 — 2021
  22. BLACKHORSE SOLUTIONS, INC (BH)Board Member, Investor2017 — 2021
  23. JASKBoard Member, Investor2017 — 2019
  24. TwistlockInvestor2016 — 2019
  25. VerodinBoard Member, Investor2018 — 2019
  26. Cylance Inc.Investor2015 — 2019Orange County, California Area
  27. HexaditeBoard Member, Investor2015 — 2017
  28. Ping IdentityInvestor2015 — 2016
  29. Fairhaven CapitalPartner2006 — 2014Cambridge, MA
  30. Motorola SolutionsManaging Director IT & Motorola Ventures2001 — 2006San Francisco Bay Area
  31. Bell CanadaAssociate Director, Business Development, Office of CIO2000 — 2001Toronto, Canada Area

Skills & more

Venture CapitalStart-ups

From Mark's professional profile.

Deals · 4

Fleet Device Management Inc.Board seat

via Ten Eleven · filed Jul 2025 · $27.9M raise

HiddenLayer, Inc.Board seat

via Ten Eleven · filed Feb 2024 · $50.2M raise

JASK Autonomous Security PlatformBoard seat

via Ten Eleven · filed Oct 2019 · $34M raise

Cyber Global Risk ExchangeBoard seat

via Ten Eleven · filed Apr 2017 · $20M raise

Attribution from SEC filings, press coverage, and firm rosters.

Other disclosed investments

Board seats

DarkhiveData & Security EarlyHypernative

Sources: SEC Form D filings · curated public sources · the firm's website.

Colleagues at Ten Eleven

Alex Doll
Investor at Ten Eleven
Andrew J Doll
Partner at Ten Eleven
Ben Charlson
Senior Associate at Ten Eleven
Brian Draves
Partner & COO at Ten Eleven
Collin Mazgaloff
Associate at Ten Eleven
Dani Andrade
Director of Events at Ten Eleven
Dave Palmer
Partner at Ten Eleven
Dixon Doll
Partner at Ten Eleven

Network1

Deepak Jeevankumar
Managing Director at Dell Technologies Capital

Investors connected to Mark in public investor directories — a warm-intro map.

Frequently asked questions

Who is Mark Hatfield?
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.
Where does Mark Hatfield work?
Mark Hatfield is Founder & Partner at Ten Eleven and Board director at Darkhive and Board director at Fleet Device Management Inc. and Board director at Cyber Global Risk Exchange.
What does Mark Hatfield invest in?
Mark Hatfield invests in AI & Machine Learning, Crypto & Web3, Cybersecurity, Data & Infrastructure, Fintech.
What check size does Mark Hatfield write?
Mark Hatfield typically writes checks of $3M – $15M.
What boards does Mark Hatfield sit on?
Mark Hatfield holds tracked board seats at Cyber Global Risk Exchange, Darkhive, Data & Security Early, Fleet Device Management Inc., HiddenLayer, Inc., Hypernative, JASK Autonomous Security Platform.
What companies has Mark Hatfield invested in?
Investments tracked here include Aembit, Cado Security, Cybergrx, Cylance, Darkhive, Darkhive Inc., Darktrace, Digital Shadows, Furl, GoSecure (formerly CounterTack), Guardare, Harmonic Security, and 19 more.
Where did Mark Hatfield go to school?
Mark Hatfield studied at McMaster University; York University.

Same school

Shared employers