I decided to start putting adsense ads on our site http://www.careerfield.org do you see any way we can improve our placements?
Yes, your design is good. But I am not sure about the content because I do not understand the purpose.
The experts suggest that you place an ad under your title, in sidebar, and at bottom of post. You got a good ad in your sidebar all I would do is add a 468 x 60 underneath your title. This way your ad shows in the fold. The fold is the area of your page viewers see before they scroll down the page. The key is to grab their attention in the fold.
Personally, I'd try and incorporate some blocks into the content. I think many people become blind to sidebar ads (that's not to say you shouldn't keep them).