Department of General Services
http://www.state.ia.us/government/dgs/Business/PurchasForBusiness.htm

http://www.state.ia.us/government/dgs/Purchase/VendorInfo/VendorGuide.htm
How to do Business with the State of Iowa - Guide for the Vendor Community

Department of Transportation
http://www.dot.state.ia.us/

Board of Regents' Institutions (universidades)
http://www2.state.ia.us/regents/

http://eservices.iowa.gov/rfp/
Vendor & Bid Opportunities