The Probst Group, LLC (TPG) is an engineering firm specializing in industrial wastewater management. Our office is located ju ... st west of downtown Milwaukee, WI. We specialize in developing new initiatives within the wastewater treatment industry. Our goal is to provide each client with the process flexibility required to meet the needs of their unique facility. Wastewater management professionals know us as a trusted partner and we invite you to get to know us, too. Contact us today for more information and a personal consultation. read more