Interstates Back to Search Interstates Categories Contractors Engineering 1400 7th Ave NE , Sioux Center , IA , 51250 1400 7th Ave NE , Sioux Center , IA , 51250 (712) 722-1662 (712) 722-1663 https://www.interstates.com/ Jobs Administrative Assistant Share × Print Email Facebook LinkedIn Twitter Pinterest Powered By GrowthZone