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HDR is an architectural, engineering, and consulting firm based in Omaha, Nebraska, United States. HDR has worked on projects in all 50 U.S. states and in 60 countries, including notable projects such as the Hoover Dam Bypass, Fort Belvoir Community Hospital, and Roslin Institute building. The firm employs over 10,000 professionals and represents hundreds of disciplines in various markets. HDR is the 9th largest employee-owned company in the United States with revenues of over $2.2 billion in 2017. Engineering News-Record ranked HDR as the 6th best engineering firm in the world in 2018, up from 9th place in 2017.[2]

Private Employee Owned Corporation
IndustryArchitecture, Engineering, Consulting
FoundedOmaha, Nebraska United States (1917)
HeadquartersOmaha, Nebraska United States
Number of locations
More than 225 offices in North America, Asia, Europe, The Middle East, and Australia
Key people
Eric L. Keen, Chairman and CEO
Revenue$2.26 billion
Number of employees
HDR, Inc. in Canada


In 1917, the Henningson Engineering Company started as a civil engineering firm in Omaha, where HDR's headquarters remain today. Willard Richardson and Charles W. "Chuck" Durham joined the firm in 1939 as interns. Circa 1950, Richardson and Durham had purchased shares in the firm, and it became known as Henningson, Durham and Richardson, Inc.

The company's first project was designing a power station for the city of Ogallala, Nebraska. Similar projects followed as the firm built water, sewer, electric, and road systems for cities and towns throughout the Midwestern United States, emerging from frontier status.

In 1983, Bouygues SA, France's largest construction company, purchased HDR for $60 million. An employee group bought back HDR in 1996 for $55 million. The company has since grown from 1,100 employees to over 10,000.[3]


HDR was the first A/E firm to join the U.S. Green Building Council in 1994, and was involved in the development of the first Leadership in Energy and Environmental Design (LEED) Green Building Rating Tool. More recently, the firm received attention for its Sustainable Return on Investment (SROI) process, wherein clients evaluate sustainable strategies today and into the future.[4]

HDR also was one of the first firms involved with the Institute for Sustainable Infrastructure,[5] which aims to do for infrastructure what the U.S. Green Building Council has done for buildings. HDR's project, the William Jack Hernandez Sport Fish Hatchery, was the first to receive an Envision rating from ISI.[6]

In the early 1990s, HDR formally established a Sustainable Solutions Program tasked with integrating sustainability into all business practices. Today, the program includes aspects of the A/E/C industry, climatology, building design, mobility, natural resources, climate change, renewable energy, land-use planning, and economic and environmental modeling.


Since the employee buyout in 1996 from the French conglomerate Bouygues, HDR has acquired over 60 firms around the world. In February 2011, HDR acquired Cooper Medical, an Oklahoma City, Oklahoma, based firm providing integrated design and construction services for healthcare facilities throughout the U.S.[7] The new alliance, HDR Cooper Medical, will provide a service design and construction delivery model to healthcare clients. In February 2011, HDR acquired Schiff Associates, a recognized leader in corrosion engineering headquartered in Claremont, California, with offices in Houston, Las Vegas, and San Diego. Schiff is now conducting business as HDR|Schiff.[8]

In January 2011, HDR acquired HydroQual, Inc., which specializes in water resource management. Based in Mahwah, N.J., HydroQual has nine offices in New Jersey, New York, Massachusetts, Florida, Utah and Dubai. HydroQual is now conducting business as HDR|HydroQual.[9] Also in January 2011, HDR acquired Amnis Engineering Ltd., based in Vancouver, British Columbia.[10] The firm provides engineering and consulting services in British Columbia and a number of international locations for hydropower and water resources infrastructure.

In March 2013, HDR acquired TMK Architekten • Ingenieure, a German healthcare architecture firm.[11] The merged company conducts business as HDR TMK and is the hub for HDR's healthcare and science design programs in Europe. HDR TMK has offices in Berlin, Dortmund, Duesseldorf, Erfurt, Kiel, and Leipzig, Germany.

In April 2013, HDR acquired Salva Resources, a global provider of technical and commercial services for mining exploration and investment in Brisbane, Australia.[12]

In July 2013, HDR acquired the business and assets of Sharon Greene + Associates, a firm specializing in transportation economics and financial analysis.[13]

In November 2013, HDR acquired Rice Daubney Architects, a firm in Sydney, Australia.[14] The merged company conducts business as HDR|Rice Daubney and is the hub for HDR's healthcare, defence, retail, and commercial work in Australia and HDR's retail and commercial work throughout the globe.[15]

In January 2015, HDR acquired the assets of MEI, LLC, a liquid natural gas engineering and consulting firm based in Pooler, Georgia.[16]

In July, 2015, HDR acquired CEI Architecture of Vancouver, British Columbia, an architectural, planning and interior design consultant.[17]

In September, 2017, HDR acquired long-time partner, Maintenance Design Group, a firm specializing in the planning and design of vehicle and fleet operations and maintenance facilities. HDR sought to add MDG's strengths in facility planning and design to complement its asset life-cycle approach to infrastructure development.[18]

In 2018 HDR expanded its water resources services by acquiring the assets of David Ford Consulting Engineers, a firm based in Sacramento, California. The firm specializes in water hydraulics, flood risk analysis, reservoir systems and operations, water resource planning and hydro-economics.[19]

In July 2019, HDR expanded its footprint in Europe and Asia by acquiring the British firm Hurley Palmer Flatt, as well as its subsidiaries.[20]


In 2018, the American Council of Engineers awarded the Grand Conceptor Award to HDR and joint venture partner WSP USA for the design and construction of a new roadway within the steel-arch Bayonne Bridge—64 feet above an existing highway it was to replace. The Grand Conceptor Award signifies the year's most outstanding engineering achievement.[21] The recognition marked HDR's fourth Grand Conceptor in the company's 100-year history, and the second time that HDR received the award two years in a row. In 2017, the State Route 520 floating bridge earned the American Council of Engineering Companies' Grand Conceptor Award.[22]

HDR also won back-to-back Grand Conceptor Awards in 2010 and 2011. The 2011 award winner was the Hoover Dam Bypass. HDR was the project manager for this project.[23][24] The Hoover Dam Bypass won several other industry awards. The 2010 winner was the Gills Onions Advanced Energy Recovery System in Oxnard, California, which uses onion waste to produce renewable energy.[25]

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  1. ^
  2. ^ writer, Steve Jordon World-Herald staff. "HDR's new CEO is focused on a smooth transition and building on company's progress". Retrieved 2019-02-09.
  3. ^
  4. ^ Williams, John; Larocque, Stephane (2009-10-05). "Engineering HDR & SROI: How to Measure "Green"". Center for a Better Life. Archived from the original on 2012-07-29. Retrieved 2011-11-06. Cite uses deprecated parameter |dead-url= (help)CS1 maint: BOT: original-url status unknown (link)
  5. ^ Potomac Digitek. "Institute For Sustainable Infrastructure (ISI): Welcome". Retrieved 2014-04-22.
  6. ^ Potomac Digitek. "Institute For Sustainable Infrastructure (ISI): News". Retrieved 2014-04-22.
  7. ^ "HDR acquires healthcare design-build firm Cooper Medical | Building Design + Construction". Retrieved 2011-11-06.
  8. ^ [1][dead link]
  9. ^ "CE News". CE News. 2011-01-13. Retrieved 2011-11-06.
  10. ^ "Amnis Engineering Joins HDR, Strengthens Hydropower Presence". 2011-01-07. Archived from the original on 2011-10-01. Retrieved 2011-11-06. Cite uses deprecated parameter |deadurl= (help)
  11. ^ Hill, Cate St (2013-03-05). "TMK Architekten merges with HDR | News | Building Design". Retrieved 2014-04-22.
  12. ^ "HDR Acquires Salva Resources". 2013-04-02. Archived from the original on 2014-04-19. Retrieved 2014-04-22. Cite uses deprecated parameter |deadurl= (help)
  13. ^ "HDR Acquires Sharon Greene + Associates". 2013-07-23. Archived from the original on 2013-10-12. Retrieved 2014-04-22. Cite uses deprecated parameter |deadurl= (help)
  14. ^ Chua, Geraldine (2013-10-24). "Rice Daubney merges operations with global firm HDR Architecture". Architecture And Design. Retrieved 2015-03-01.
  15. ^ "Going for a premium? Some Australian architects are". BRW. 2013-10-25. Retrieved 2014-04-22.
  16. ^ Gonzalez, Cindy (2015-01-07). "Acquisitions will boost HDR's global workforce to about 9,200". Omaha World-Herald.
  17. ^ "Merger & Acquisition Activity - Q3 & Q4 2015" (PDF). Chartwell. 2015.
  18. ^ "HDR Acquires Maintenance Design Group". ENR. 2017-10-03.
  19. ^ "HDR Acquires David Ford Consulting Engineers". The Bakersfield Californian. Retrieved 2018-08-06.
  20. ^
  21. ^ "ACEC - Engineering Excellence Awards". Retrieved 2018-08-03.
  22. ^ "HDR Wins ACEC Grand Conceptor for SR 520". 2017-04-16. Retrieved 2017-12-29.
  23. ^ "Home" (PDF). ACEC. Retrieved 2015-03-01.
  24. ^ "Hoover Dam Bypass Becomes 2nd HDR Project to Win American Council of Engineering Companies' Highest Honor". 2011-04-01. Archived from the original on 2014-04-19. Retrieved 2014-04-22. Cite uses deprecated parameter |deadurl= (help)
  25. ^ Gills Onions (2009-07-17). "Gills Onions Advanced Energy Recovery System". Retrieved 2014-04-22.