Cybersecurity company Sevco hires Ken Shelton, ex-Randori, as chief technology officer and promotes Aaron Griffin to chief architect ... Graybar promotes Dennis DeSousa to chief of staff and advances to senior vice presidents David Bender for East region; Brian Delaney, West region and subsidiaries; Danna Stone, marketing; and Andy Ipson, supply chain management ... Cybersecurity company Sophos appoints Torjus Gylstorff, ex-Thales, as chief revenue officer and Jon Bove, ex-Fortinet, as senior vice president-Americas sales ... Marcia Dempster, ex-Keeper Security, joins cybersecurity company Securonix as vice president-Americas channel sales ... IT services and cybersecurity provider CompassMSP adds Ryan Benson, previously Stratascale, as vice president-security.