I'm with Kevin on external style sheets and centering - especially on a large monitor it looks unbalanced.
Additionally, if you want to be found by search engines then take the following steps first and foremost before contacting an SEO to further improve your rankings:
1. Either redirect
CleaningBiz agency business solutions [with WWW] to
CleaningBiz agency business solutions [without WWW] or vice versa (google .htaccess www redirect - there are millions of results, choose any one of them, they're pretty much all the same). This step will take 5 minutes and a decent company won't charge you for it. If you're in doubt as to why this is important search for "canonicalization" or "canonical duplicate content"
2. You don't have an h1 tag - get one and put the keywords you want to rank for in it - keep it so it reads naturally too ie. don't stuff keywords into it.
3. The page titles are all different - this is good,
don't make them all the same.
From a usability perspective fix the following:
The site name should be a link to the main page, this is expected behaviour for websites - make it easy for your visitors
I hope this helps you a little.