Headquartered in Omaha, Nebraska, HDR was founded in 1917 as the Henningson Engineering Company. The employee-owned company pioneered water and sewer systems for new cities and towns throughout the Midwest, helping them emerge from frontier status. Today, HDR is an architecture, engineering and consulting firm with more than 7,800 professionals in 185 locations worldwide. All of them are committed to helping clients manage complex projects and make sound decisions. HDR is consistently ranked among the top architecture and engineering firms by leading industry publications including Engineering News-Record, Modern Healthcare, Environmental Business Journal, Interiors, and Building Design and Construction. For example, Modern Healthcare has ranked HDR in the top four healthcare design