Job Description for web hosting engineer

Installation and Management WHMCS/cpanel/WHM 
Domain, Hosting management- disk space, server usage management, Reseller/Shared Hosting Management
VPS and dedicated server
Linux 
backups, configuration, renewals
BackUp
Cron Jobs
DNS
MySQL 
Mail
firewall recommended for website security
Linux terminal commands, shell scripting,

Practical knowledge of whm / cPanel / Plesk / WHMCS is must