Tim comes from a plumbing family and grew up around his grandfather, father, and uncles who were all plumbers. His grandfather Barney started his business, Barney Dereszynski Plumbing & Heating, in 1922 on the South Side of Milwaukee. In 1975, Tim ventured out into the world on his own and opened up Tim´s Plumbing Company from a small office in Cudahy, WI. Over time, he grew and expanded the business adding multiple trucks and employees until 1990 when his uncle, Julian Dereszynski, wanted to retire. Tim then took over his grandfather's original business at 2922 South 13th Street just north of Oklahoma. Tim ran his grandfather’s business from the South 13th Street location from 1991 until 2007 when he moved to a smaller facility in Oak Creek.