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Fiber Broadband Association names Frontier’s Marissa Mitrovich, also former Verizon, vice president-public policy, effective Jan. 4 ... Cytellix cybersecurity software as a service and managed services company names Walt Czerminski, ex-Fortium Partners, CEO, succeeding President-CEO Brian Berger, who remains president and board member.

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8x8 appoints Chief Financial Officer Samuel Wilson interim CEO, succeeding terminated Dave Sipes; Senior Vice President-Finance Kevin Kraus named interim CFO; Laurence Denny, former chief compliance officer, deputy general counsel and assistant corporate secretary, promoted to chief legal officer and corporate secretary, effective Dec. 9, succeeding Matthew Zinn, resigning to accept a chief legal officer position in an unrelated industry ... Telstra names Zayo Group’s Katy Greenfield vice president-customer solutions, Americas.

Hearst Television promotes Michael Saffell to regional director-engineering, based in New England … Cloud communications provider Toku names 8x8's Christophe Riccardi its first chief operating officer ... Checkmarx, application security testing platform, adds Cognyte’s Amit Daniel as chief marketing officer ... Synopsys recruits Zendesk’s Shelagh Glaser as chief financial officer, effective Friday; current CFO Trac Pham, who previously announced his planned retirement, will remain with the company through December ... Arm adds former Qualcomm CEO Paul Jacobs and Rosemary Schooler, former Intel corporate vice president-general manager, data center and AI sales, to its board.