Red Hat names Andrew Brown from parent IBM senior vice president-chief revenue officer, effective Oct. 1, succeeding Larry Stack, leaving Red Hat at the end of Q3 to join IBM as a senior adviser ... Emnify, cloud-native IoT connectivity solutions company, names Artur Michalczyk, ex-Vonage, chief technology officer ... Data company Finch AI hires Jennifer Nelson, former Amazon Web Services general manager-national security, as chief operating officer ... Robert Half promotes Sara Gagen to senior vice president-applications, tech and innovation, leading its cloud solutions department ... EVgo, public fast-charging network for electric vehicles, taps lead independent director Badar Khan to succeed Cathy Zoi as CEO when Zoi retires on or about Nov. 9; she remains an adviser through year-end ... Rivian Automotive adds former Waymo CEO John Krafcik to its board ... Data-streaming company Confluent promotes Rohan Sivaram to chief financial officer, effective Aug. 16, replacing Steffan Tomlinson, leaving ... IT distributor TD Synnex names lead independent director Ann Vezina its next chair, effective Sept. 1, succeeding Dennis Polk, who remains a board member and keeps his executive responsibilities ... Klaviyo, marketing automation platform, adds former Workday co-CEO Chano Fernandez, ex-Medallia CFO Roxanne Oulman and Susan St. Ledger, HashiCorp president-worldwide field operations, to its board, expanding it to nine members ... QuSecure, post-quantum cryptography company, adds Cisco Distinguished Architect Craig Hill to its board ... Dexian, IT and workforce solutions provider, names Nordic Consulting’s Jeff Buss, also ex-Ernst & Young, chief information officer ...