Pleas give me some advice

[eluser]TWP Marketing[/eluser]
I suggest adding some images relating to each area/job type.

Use different background colors within the separate boxes.

Create a site logo. Even if it it only larger font text, and stick it somewhere near the top of the page.
An image logo would be better, as you have more options for design, but you need something to identify the site itself, as soon as the page opens.

Use larger fonts as header text to allow the user to quickly locate the different areas on a page.