Kirstjen Nielsen at the Annual Meeting 2016 of the World Economic Forum in Davos, January 20, 2016. (World Economic Forum / CC-BY-2.0) DHS head: ‘Relentless resilience’ will drive collaboration on cybersecurity Nielsen said DHS plans to use a newly established critical infrastructure hub to focus on the resilience of 'essential functions.' Nov 9, 2018 By Zaid Shoorbajee