That being said you want to have the content (words) and the layout (design) of the site complete first so that they know what to build you.
Alternatively you can do it yourself using a site like www.squarespace.com, www.weebly.com, or www.swixx.com
I'm assuming you are asking what type of employee needs to be hired to help build a website?
The answer is, first you need to know what type of website you want and then you find someone who knows how to develop it. The website direction should be led by someone who is adept to marketing and sales so they can manage the content based on the need to drive action.