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The County of DuPage
Wheaton, Illinois


Firms wishing to submit a Statement of Interest (SOI) must first be prequalified or approved in the specific category(s) of professional services being requested by the County. Firms prequalified or approved by either the Illinois Department of Transportation (IDOT) or Illinois Capital Development Board (CDB) will not need to be separately prequalified or approved by the County for the same categories of work.