Jon Ezrine

Chief Executive Officer

Jon Ezrine brings a great mix of enthusiasm, drive, and operational focus to Castellan. Jon has a strong track record of leadership in high-growth software and managed services companies including roles as the COO of Nexidia, a customer service analytics software company, and as the CFO of Witness Systems, a customer service software business which successfully went public during Jon’s tenure. Jon has managed companies through multiple stages from startup through IPO and acquisition. Jon enjoys a number of outdoor pursuits including backpacking, skiing and cycling.  He and his wife have two adult children.

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