Fettes, Love & Sieben is a union plumbing and heating contracting company that employs more than 60,000 tradesmen, including plumbers, pipe fitters, laborers and operating engineers. Founded in 1924, the company provides contract and commercial and residential services, as well as repair and maintenance. Its completed projects include Oak Park Public Library, Kraft Foods Pilot Plant, Fountain at Shedd Aquarium and Atlantic Tavern Pale Brewing Company Factory.