LMS: Joomla to Moodle migration + secure video delivery specialist

We’re a small education organisation replacing a legacy Joomla learning portal with a secure Moodle-based platform. The site hosts ~222 courses and >1,000 videos (~1.3 TB). After a recent compromise we need a secure, maintainable LMS and separation of media from the application server... (Budget: $10000 - $20000 CAD, Jobs: Amazon S3, CentOs, Joomla, Linux, MariaDB, Moodle, MySQL, PHP, Web Security)