Krebs Stamos Group, cybersecurity consultancy founded by Chris Krebs, former director of the Cybersecurity and Infrastructure Security Agency, and Alex Stamos, Stanford University professor and former Facebook chief security officer, names former inaugural fellow Micah McCutchan president-chief operating officer ... Roku taps Stitch Fix’s Dan Jedda, also former Amazon, as chief financial officer, effective May 1, succeeding Steve Louden, who said last year he's leaving Roku and will stay on until August ... Aircall, phone and communication platform for sales and support teams, names Alkami Technology’s Mary Nelson chief customer officer, and Deluxe’s Greg Peel, also former Paychex, vice president-sales, North America ... American Software adds PDI Technologies CFO Nicole Wu to its board ... Security company Netography names Tripwire’s David Meltzer its first chief product officer ... Marketing technology company NextRoll taps former RealNetworks executive Sue Choe as CFO.