WordPress Maintenance & Hosting on cPanel

Looking for someone to maintain multiple WP sites on my reseller hosting cPanels. Update WP, themes, plug-ins, etc. Do link checking and minor fixes and changes on Wordpress websites. Need to be able to manage backups and reseller hosting using cPanel. There are approximately 100 sites on 2 reseller hosting accounts. I am expecting this to take about 20 hours per week or less, on average, to maintain each site at least every other week.

My company is a small website design and hosting company that has been in existence since 2012. I am looking for someone experienced in the tasks and responsibilities above who may also want to grow into becoming a manager. Access information for the sites and cpanels is on TeamWorks project management software, if you are not familiar with TW it is easy learn and use.