John Jack
Venture Partner at Shield Capital
San Francisco, California
Overview
Work Experience
Board Partner
2012 - Current
Andreessen Horowitz is a venture capital firm that provides seed, venture and growth-stage funding to the best new technology companies.
Andreessen Horowitz is a stage-agnostic venture capital firm with assets under management across multiple funds.
Principal
2012
Start-Up Consultant and Board Member to venture-backed companies.
CEO Partner
2019
Harmonic combines an established, successful investment team with proven, world class tech operators to invest in market leading growth companies and deliver unparalleled support and guidance toward their success.
Investing in market-leading growth companies and delivering unparalleled support and guidance toward their success
Venture Partner
2022
We invest in company founders building frontier technologies that matter
Shield Capital is a venture capital firm that invests in founders building frontier technologies.
Member, Board of Directors
2013
Traditional Security Doesn't Stop Lateral Threats. Illumio's Adaptive Segmentation Does
Illumio is a provider of a SaaS platform offering automated enforcement against cyberattacks.
Raised $557,500,000.00 from Thoma Bravo, Owl Rock Capital, BAM Elevate, Hamilton Lane and Franklin Templeton.
Member, Board of Directors
2015
Contrast Enterprise knows where apps are weak and can instantly deploy adaptive defenses to protect an organization's entire application portfolio. Contrast is the first application security product to integrate defenses across development and operations, unifying vulnerability assessment, security visibility and attack protection throughout the application lifecycle.
Contrast Security is a modernized application security, embedding code analysis, and attack prevention directly into the software.
Raised $269,000,000.00 from AXA Venture Partners, Acero Capital, Warburg Pincus, General Catalyst, Battery Ventures, Liberty Strategic Capital and M12 - Microsoft's Venture Fund.
Member, Board of Directors
2022
The Extended Enterprise is full of hidden risks – Aravo for Third-Party Management makes them visible, measurable, and manageable.
Aravo Solutions provides on-demand, SaaS-based supplier information management (SIM) solutions and services for enterprises.
Raised $51,388,500.00 from Stephen Friedman, Big Sky Partners, Stephen Friedman and Big Sky Partners.
Member, Board of Directors
2012 - 2021
CipherCloud is committed to building trust in the cloud. Our revolutionary cloud encryption gateway technology is enabling organizations worldwide to enjoy the benefits of the cloud that otherwise wouldn't be able to due to concerns about data security, privacy, residency, and regulatory compliance. Acquired by Lookout March 2021
Lookout, Inc. is the endpoint to cloud security company purpose-built for the intersection of enterprise and personal data.
Raised $432,339,000.00 from BlackRock.
Member, Board of Directors
2017 - 2020
Respond acquired by Fireye November 2020.
Respond Software is a provider of automated cyber security threat protection.
Raised $32,000,000.00 from CRV, ClearSky and Foundation Capital.
Founder and Co-CEO
2016 - 2019