Dedicated Server with Plesk hosting ongoing support person

We are looking for a skilled server tech that can be called upon to assist in technical assistance on our dedicated server. While all level 1 support is done by us we need someone the maintain the server health and configure settings on the new build. This is a long term contract as the support will be adhoc and often when we need assistance. Due to previous security issues we will ONLY accept freelancers that live and work within Australia or New Zealand and can provide proof of identity and local references before any work can be started. This role requires maximum integrity and we MUST trust you with root server access. As said, this will be hourly work and often for only a few hours at a time. We are prepared to offer a small retainer as an 'on call' arrangement. Thank you