From 30,000 feet, we all know about the dramatic increase in federal contract expenditures over the last 10 years. An interesting report [pdf] published by the Center for Strategic and International Studies takes a much closer look at DOD contract spending since 1990. It does a good job of quantifying the increase in service contracts, the increase in Army contracts as a percentage of overall DOD spending, and the increase in the use of multiple-award contracts such as the Federal Supply Schedule. It concludes with a comparison of the list of the Top 20 DOD contractors from 1999 and the same list from 2009. Definitely worth a read.