Energous announces that Cesar Johnston is no longer president-CEO, but he remains a board member; board establishes office of the chair composed of Chair Reynette Au and Chief Financial Officer Mallorie Burak, who's named interim principal executive officer while the board seeks a permanent successor to Johnston ... DirectDefense, information security services company, names former Cisco executive Patty Wright as inaugural member of its newly formed advisory board ... Momentus, commercial space infrastructure company, hires Ziteo Medical’s Lon Ensler as interim CFO, effective April 2, replacing current CFO Eric Williams, resigning, effective April 1 ... Contentstack, digital experience platform provider, hires Zuora’s Gurdeep Dhillon, also former Adobe, as chief marketing officer ... Corning announces Michaune Tillman, ex-Worthington Steel, as senior vice president-general counsel ... Vast Data appoints Rick Scurfield, ex-NetApp, as chief revenue officer.