John McCormack

Executive Partner at Siris Capital Group

Mr. McCormack offers more than 30 years of expertise leading and scaling enterprise businesses in the cybersecurity and internet infrastructure sectors, having served on the Boards of Directors for a number of leading enterprise software organizations, including Ping Identity, App River and Fidelis Cybersecurity. Throughout his career, he has led and realized value-creation activities, including Ping Identity’s initial public offering and AppRiver’s sale to Zix Corp. While serving as the Chief Executive Officer of Forcepoint, Mr. McCormack built the company from a $180 million web filtering business to a global cybersecurity brand that executed a $1 billion sale to a private equity fund and then a $1.9 billion sale to Raytheon.



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  • Executive Partner

    June, 2021 - present