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The online tools report markup and CSS errors:
http://htmlhelp.com/cgi-bin/validate.cgi?u...mp;warnings=yes
http://jigsaw.w3.org/css-validator/validat...g=1&lang=en

Don't use px for font sizes on the web. Instead, use 100% for body text, larger percentages for headings and the like, and (slightly) smaller percentages for legalese and similar fine print.

You have images of text that have no alt text. Some just lack an alt attribute. Others are background images, which therefore cannot have alt text. It is better to use real text, but if you use images of text, then you should provide alt text. See also:
http://htmlhelp.com/feature/art3.htm

Once you have ensured the code is all compliant, you will be well away, the site layout looks good

Sorry to say that but your site is not having corporate look.
I think you should go for redesign of your site.

From the prospective of seo you meta titles are not good you can make it a lot better and more meaningful for search engine.