have a custom hypervisor (ZPF) but things like VMWare ESXi / KVM / oVirt / RHEV Classics: Apache, MySQL, Redis, Varnish Logstash & Elasticsearch Networking (switching, routing, firewalls, IDS / IPS, VPN, load balancing, DNS, Cisco, F5, Akamai) Multi cloud setup … Digital Ocean, Rackspace, Linode etc DNS, NTP, SMTP, Jenkins A solid background in Linux System Administration Functions and responsibilities This is a dynamic and varied role, which includes things like: Build, deployment and maintenance of new and existing environments Designing and maintaining highly available architectures Security (patch management, vulnerability scanning ...