Company Description. Schmitz Ready Mix, Inc. is a family-owned ready mixed concrete supplier headquartered in Milwaukee, Wisconsin, with multiple locations serving areas such as Green Bay, Appleton, and Richfield, among others. The company has proudly supported residential, commercial, municipal, and DOT concrete projects across several counties, including Milwaukee, Ozaukee, and Waukesha. Known for being "Large Enough to Serve, Small Enough to C...