Experienced in similar projects. You can check feedback of clients in moodle projects. I have a query, do you have any customisation in your moodle website ?
Hello,
I am a moodle developer with 7+ years of experience and completed more than 100 moodle projects. I can upgrade your site from 1.9 to 3.3 without any data loss and minimum downtime. Please check my profile for similar projects completed by me.
Please message me to have a discussion and create an upgrade plan. I am glad to answer any questions you may have.
Malaka