Part Two: Site Language (the writing)
The text on the site appears to have come from multiple sources and multiple writers. While the quality of the overall writing is acceptable, there is a tremendous opportunity to give your organization a 'corporate personality' via the style of writing on the website.
Consider assigning the role of web-writer to one or two individuals who can create a tone and attitude and a consistent style of language - and have them re-write the entire site. This won't take too much effort because the content is all there; it just needs to be massaged. As a result, the content will be more interesting and easier to understand, as opposed to an 'info dump' of varying styles.
When rewriting, remember that people read differently on-line than they do on paper so ensure the writing is succinct and to the point, in bullet form where appropriate; ensure long passages are broken up into small chunks; and create headlines and subheads to bring out the key points and key messages.
Some people in your audience are intimidated by the Internet, and others face challenges with respect to website navigation and reading in general. With this in mind, keep everything (especially the writing) simple and logical and constantly strive to 'apply' the writing to the mindset of the visitors.
Make the content interesting to read.
