GVTC Communications, fiber optics communications provider, elevates Josh Pettiette, vice president-product, business development and strategic planning, to president-CEO, effective July 1, following retirement of current President-CEO Ritchie Sorrells ... SambaNova Systems, chipmaker for generative AI, adds founding Chairman Lip-Bu Tan, also former Cadence Design Systems CEO, as executive chairman ... Saviynt, provider of cloud-native identity and governance platform solutions, hires James Ross, ex-Collibra, ForgeRock and CA Technologies, as regional vice president-Australia and New Zealand ... Liongard, attack surface management cybersecurity platform for managed service providers, announces Stephanie Weagle, ex-Atakama, as chief marketing officer ... Lazard, financial advisory and asset management firm, adds Liontree partner Ben Braun, also former head-media and telecommunications M&A at Bank of America Merrill Lynch, as managing director-global head of newly created media, entertainment and sports advisory team ... Media company Raptive taps Dana Storm Santiago, ex-Essence Ventures, as vice president-inclusive partnerships ... Sophos, cybersecurity company, moves interim CEO Joe Levy to permanent CEO and taps Imperva’s Jim Dildine as chief financial officer … Infinera, optical networking and semiconductors company, announces Regan MacPherson, ex-SunPower, as chief legal officer-corporate secretary, succeeding David Teichmann ... TextUs, text messaging platform, adds Rachel Fernandes, ex-Seismic, as senior vice president-product … The Futurum Group, tech advisory, research, intelligence and media firm, appoints Dion Hinchcliffe, ex-ZDNet, as vice president and practice lead-chief information officer practice.