Milton grew up in Tyler and graduated from Robert E. Lee High School. He worked his way through college as a Plumber's Apprentice in the Austin and San Antonio area. After earning his Bachelor of Arts degree from Trinity University in San Antonio, he returned to Tyler, and continued to work part-time in the trade while teaching full-time at Grace Community School. Upon receipt of his Master Plumber's license, he began Vanderpool Plumbing as a Sole Proprietor. In January 1995 he incorporated as American Plumbing Company, Inc.