Update Website For Environmental Consultant (Joomla Backend)

We own an environmental company. Our website, www.aursi.ca, is out of date. We would like some changes made. They include:

1) Change menu items
1a) The overall design and layout will not change
1b) The "Projects" menu item will be removed
2) Change the content in the side-boxes
2a) Change "so to speak" to "social media / contact us", including links to email, facebook, linkedin, twitter, etc.
2b) Change "networking" to a link to our most recent blog post, including, the title and first few lines of text, plus an option to subscribe
2c) Randomize the "success stories" box. It will look the same as it does now, except the stories will be randomly selected, and the links will go to pages on our website.
3) Creating a functioning blog page
3a) Some design will be required, as the layout will be different
3b) We would like a standard blog format, including options such as: subscribe, about us, blog posts (plus commenting ability), automatically recommendations for other posts, categoris, connect (email, social media, etc.)
3c) Blog posts must be easy to submit from our end
3d) An examples of a blog format we like is: http://www.sustainabilityconsulting.com/blog/, and
4) Automatic linkage to facebook, linkedin, twitter, other social media tools

Our current backend is Joomla 1.5. We do not plan on changing this.

We would like a candidate with experience:

1) Website content management, including sample websites
2) Blog development, including samples
3) Social media integration

Thanks!