Hello
As per my understanding you are looking for a Moodle Expert to assist you for Updating your an existing site & Analysis for any Bug Issues,Malware.
As a Moodle Expert,I can
-> Moodle Customization and Enhancements
-> Moodle Upgrade,Update & Migration
-> Bug Fixing & Troubleshooting
-> Moodle Web Security
-> Maintenance & Support
-> Moodle Modules,Plugins,Functionality
-> And offcourse complete web solution
I would like to tell you that I am working on Moodle Platform from last 7 years.I have worked on its different versions such as 1.x, 2.x and now 3.x.
I have worked extensively with Moodle,PHP,MySQL,HTML,CSS,Javascript,Ajax both in Linux & Windows Environment.
I don't want to bore you a hung link of the list. I believe communication is key to any successful project, and I'd like to start things off on the right foot but please suggest can we schedule an online meeting to discuss the project further &after that suggest you time,cost estimation accordingly.
Thanks & Regards
HS Virasat Solutions