CircleRock Capital, the venture capital syndicate firm, has appointed Paul Calatayud as a partner, as the Irish business continues to expand its presence in the United States. Calatayud is a five-time chief security officer (CSO) with experience at major Fortune 500 companies, including Palo Alto Networks, which has a market capitalisation of $138 billion (€119 billion), and UnitedHealth Group, valued at more than $280 billion.Calatayud joins CircleRock Capital’s cofounders Barry O’Neill and Conor Sharpe as the firm sets up its first permanent investment vehicle alongside its existing deal-by-deal business. CircleRock has previously appointed venture partners like Sarah Irwin, the former…

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