Network And System Administration Experts

Must have solid Prestashop CMS experience and follow DH42 optimisation techniques.

Review existing AWS Lighsail cloud environment(s) and provide recommendations on ways to improve security, efficiency and reduce costs.
WS Lightsail server has 4 websites, for some reason last week the sites are running slow!

Also, the current setup login uses Plesk to facilitate the email function and also acts as an alternative to Cpanel, the Plesk login is via an Ip address which causes the login to show as not secure...

Emails for three of the four websites continually have SSL issues in Outlook 365!