Ok Here are my suggestions.
Home Page:
-The skyline pic is a bit large & blurry and I don't think the other building pic is needed- overkill
-Maybe try to fit company name in the header section.
-The navigation menu in red and blue is very hard on the eyes. Make sure you are only using 2-3 complementing colors for the entire site.
-There are at least 3 different fonts being used, not counting company name. Pick 1, at most 2. Maybe one type for headings, another for content.
Blog:
-It would be a good idea to install Wordpress on your domain instead of using blogger, more professional looking.
-You want to continue your color scheme to the blog.
-If you decide to keep blogger, have the "blog" link open in a new window so visitors aren't completely leaving your company site.
About us, Contact us & Services:
-these link to nowhere
Any questions, ask away.