looking for joomla, moodle expert with strong design background

I am looking at this as a long term ongoing position for candidate with advanced expertise in Joomla (essential because website is Joomla based and is already quite large and complex with lots of modules and customisation). Candidate must also be an expert in Moodle (where the e-learning courses which we sell are hosted). The candidate must have strong photoshop design background also. Candidate must have a proven and impressive portfolio which they can show me. References required. They should speak English as a native language. First task is related to the following topics: turning on google authors, fixing google analytics code, fixing [login to view URL], fixing errors picked up on google webmaster tools, implementing social like buttons, implementing social icons which when clicked converts user to FB, G+, YouTube fan or twitter follower, producing photoshop mockups to improve the design in various sections of the website, and implementing it in Joomla. Therefore Joomla expertise is essential. Will pay up to $12 per hour. Tasks ad-hoc but fairly regular work and will be based on estimated number of hours we agree to complete each task.