Advocado, media data-as-a-service company, adds as strategic advisers Scott Garner, ex-Yahoo; Jaime Siegel, former Acacia Research Group; and Brian Siegel, ex-Sony Direct ... Cybersecurity company PhishFirewall taps its Chairman Mark Petroff as its new chief financial officer ... Supermicro adds former ESS Technology CEO Robert Blair to its board ... Identity security company CyberArk names Omer Grossman, former head-Cyber Defense Operations Center for Israel Defense Forces, global chief information officer.