1. The Sigma Group 1300 W Canal St, Milwaukee, WI 53233 Coordinate: 43.0318,-87.92842 Phone: (414) 643-4200
2. Geotill Inc. 11414 W. Park Place Suite 144, Milwaukee, WI 53224 Coordinate: 43.15288,-88.05332 Phone: (414) 875-3338