Website manager or developer for 40 websites

Require a website manager to develop and manage a portfolio of 40 domain names. All domains are currently hosted on a WHM reseller package. Some of the domains already have existing Joomla and HTML websites, but majority have no website. All domains have cpanel backend for installation of scripts etc. I require a developer to organise the websites, upload or install Joomla, develop website templates, add scripts, manage their content and strategy for SEO. Manager can subcontract work out if necessary to others ie content, templates, blogs etc I prefer all sites to have Joomla or Wordpress as the main content management system. Once joomla has been installed, customised for each domain name with template and scripts installed, it will be a simple process to check the sites and make sure they are upto date. The bid is for a monthly salary to manage the approx 40 websites. The salary will include regular maintenance and updates of the websites, but 1st month charge may be higher to get sites up and running.