Where does John "JJ" Jack work?

John "JJ" Jack is Board Partner at Andreessen Horowitz.

What check size does John "JJ" Jack write?

John "JJ" Jack typically writes checks of $100K – $5M.

Where did John "JJ" Jack go to school?

John "JJ" Jack studied at University of California, Berkeley (BS, Finance); St. Ignatius College Prep (GED, Physics).

John "JJ" Jack

Investor

Board Partner at Andreessen Horowitz · CEO Partner at Harmonic Growth Partners · Venture Partner at Shield Capital

San Francisco, California

Writes $100K – $5M checks · typically $1.5M

Find your path to John

2,499 people in our graph share verified history with John — schools, employers, funds. One of them is your warm intro.

Iva MessyunlockedJohn: together at Andreessen Horowitz (2018–2020)

×2John: together at HP Software

×2John: together at Andreessen Horowitz

×7John: together at University of California, Berkeley

About

Software industry executive who served as CEO of Fortify Software and Covalent, and COO at The Vantive, with a career spanning sales and senior leadership roles starting at Sybase.

Invests in

AI & Machine LearningCybersecurityDefense TechRoboticsSpace Tech

Experience

Andreessen HorowitzBoard Partnercurrent2012 — presentMenlo Park, CA
Castle Peak GroupPrincipalcurrent2012 — present
Harmonic Growth PartnersCEO Partnercurrent2019 — presentUnited States
Shield CapitalVenture Partnercurrent2022 — presentSan Francisco, California, United States
IllumioMember, Board of Directorscurrent2013 — presentSanta Clara, CA
Contrast SecurityMember, Board of Directorscurrent2015 — presentPalo Alto, CA
Aravo Solutions - Integrated Risk & ResilienceMember, Board of Directorscurrent2022 — presentDallas, Texas, United States
CipherCloudMember, Board of Directors2012 — 2021
Respond Software Inc.Member, Board of Directors2017 — 2020Mountain View, CA
Coconut Cay Cocktail CompanyFounder and Co-CEO2016 — 2019San Francisco Bay Area
AlienVaultMember, Board of Directors2012 — 2018San Mateo, CA
ClearSlide, Inc.Member, Board of Directors2012 — 2017
RedOwl AnalyticsMember, Board of Directors2017Baltimore, Maryland Area
The Olympic ClubPresident for 2015 and Member, Board of Directors2013 — 2015San Francisco, CA
CenzicMember, Board of Directors2012 — 2014
St. Ignatius College PrepMember, Board of Regents2006 — 2012
HP SoftwareVice President Field, Enterprise Security Products2011 — 2012
HP SoftwareCEO Fortify Software, An HP Company2010 — 2011
Fortify SoftwareChief Executive Officer2004 — 2010
Covalent TechnologiesChief Executive Officer2000 — 2004
VantiveChief Operating Officer1995 — 1999
SybaseVarious Sales Executive Positions1986 — 1995

Colleagues at Andreessen Horowitz

Adam Alpert

Founder at Pangea.app

Aditya Mehta

Founder at Suggestr

Aiden Slavin

Policy at a16z crypto

Alex Immerman

Partner at Andreessen Horowitz

Alex Rampell

General Partner at Andreessen Horowitz

Ali Yahya

General Partner at a16z crypto

Alisha Litman

Events at a16z crypto

Andrew Chen

General Partner at Andreessen Horowitz

Network2

Akhil Iyer

Principal at Shield Capital

David Rothzeid

Principal at Shield Capital

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

Frequently asked questions

Who is John "JJ" Jack?: Software industry executive who served as CEO of Fortify Software and Covalent, and COO at The Vantive, with a career spanning sales and senior leadership roles starting at Sybase.
Where does John "JJ" Jack work?: John "JJ" Jack is Board Partner at Andreessen Horowitz.
What does John "JJ" Jack invest in?: John "JJ" Jack invests in AI & Machine Learning, Cybersecurity, Defense Tech, Robotics, Space Tech.
What check size does John "JJ" Jack write?: John "JJ" Jack typically writes checks of $100K – $5M.
Where did John "JJ" Jack go to school?: John "JJ" Jack studied at University of California, Berkeley (BS, Finance); St. Ignatius College Prep (GED, Physics).

Same school

Also attended University of California, Berkeley2,000

Byron DeeterPartner at Bessemer Venture Partners Steve WozniakCo-founder of Apple Tony XuCo-founder & CEO of DoorDash Aravind SrinivasCo-founder & CEO of Perplexity AI Ali GhodsiCo-founder & CEO of Databricks Ryan PetersenFounder & CEO of Flexport

+ 1,994 more

Shared employers

Also worked at AlienVault13

Barmak MeftahGeneral Partner at Ballistic Ventures Roger ThorntonGeneral Partner at Ballistic Ventures Caroline SalasInvestor at Ballistic Ventures Ken ElefantPartner at Sorenson Ventures Bob SpinnerFounding Partner at Jackson Square Ventures Rita SelvaggiOperating Partner at Elsewhere Partners

+ 7 more

Also worked at RedOwl Analytics6

Les CraigInvestor at Next Frontier Capital Ryan McQueeneyCFO at Acadian Ventures Management, Llc Guy FilippelliManaging Partner at SQUADRA VENTURES Robert Ackerman Jr.Managing Director and Founder at AllegisCyber Capital Jay LeekManaging Partner at Syngenta Group Ventures Michael MadonExecutive Officer, Director at ProjectDiscovery

Also worked at HP Software458

Ben HorowitzCo-founder & General Partner at Andreessen Horowitz Bill GurleyGeneral Partner Emeritus at Benchmark Steve JurvetsonCo-founder of Future Ventures Ana AndreescuInvestor at Index Ventures Zhenyu TangInvestment Director at Intel Capital AyshaAdvisor at Clear Ventures

+ 452 more

Also worked at Covalent Technologies2

Ted PurcellChief Revenue Officer at Tealium Mark DouglasPresident & CEO at MNTN