If you prefer to get someone else to do the installation work, you should choose a competent CMS Developer. You will need to provide access to your hosting server, or the developer can arrange the hosting for you. The following list is companies that specialise in CMS installations and theme design development.
Slinky Web Design are professional website developers based in Perth Australia with clients all over the World. They are proficient at installation, theme design, website maintenance and online marketing services. Their specialty is WordPress development.
Slinky Digital Marketing can help you with the online marketing aspect of your CMS website. They will install any applicable WordPress plugins to help with SEO such as; All in One SEO Pack, XML Sitemaps, Google Analyticator, Custom Permalinks, ShareThis and a few others depending on the client’s requirements.