There were several "embedded" positions listed in the Chicago Tribune's online classifieds in O'Fallon, IL. IINM, that is sorta in your neck of the woods. Might what to give it a try.
Go to www.chicagotribune.com, click on the "jobs" tab, then under the "Search By Field" heading select "Engineering". On the Engineering page, select "Software Engineering" under "Search by Job Type" in the lower right-hand part of the page. Then select "Narrow Search by State" and select Illinois. (Or by Missouri, if you want.) You'll find the O'Fallon jobs scattered about the listings.
Warning: Most (if not all) of them are with Northrup....