JJ

John Jack

Principal at Castle Peak Group

San Francisco, US

About

JJ has over 32 years of sales, marketing, and executive management experience. JJ served as the CEO and President of Fortify Software Inc., which was acquired by Hewlett-Packard. He served as the President of OS Group, LLC and served as its CEO for 3 years. He served as the President and CEO of Shaman Corporation and as the COO of The Vantive Corporation, where he was responsible for worldwide sales, consulting, support, channel, and education organizations. He began his career at Sybase as one of the first sales representatives and eventually became SVP of sales.

Position in the VCSift Database

  • 658 investors hold the Principal role in VCSift. John Jack is one of them.
  • 7,285 investors are based in San Francisco, California, United States.

Data sourced from 410,343 investor profiles. Updated July 2026.

Investment Focus

Stages
seed

Contact Information

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