Arkose Labs, bot management and online security company, hires Mimecast’s John Walsh as chief technology officer; Ashish Jain, who previously headed engineering and product for Arkose, moves to chief product officer ... Qrypt, quantum-secure encryption company, adds Roger Biscay, Cisco senior vice president-corporate treasurer and head-global corporate security, to its board of advisers ... SkyePoint Decisions, cybersecurity solutions provider to the federal government, promotes Heather Conigliaro to president ... AlertMedia, emergency communications provider, names Marc Ostryniec, ex-BigCommerce, chief revenue officer.