HW Lochner Inc is an engineering and construction firm based in Chicago, Illinois. The company was founded in 1944 and provides a range of services including transportation planning, design, and construction management. The company has worked on a number of high-profile projects including the reconstruction of the I-35W bridge in Minneapolis, Minnesota. HW Lochner Inc is a privately held company and is owned by its employees. The company has offices in 18 states and employs over 500 people.