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The HNTB Companies is an employee-owned organization of infrastructure firms. The three operating companies of HNTB Companies include HNTB Corporation, a transportation, engineering, planning and construction management firm; HNTB Architecture Inc., whose design professionals provide services to the buildings market; and HNTB Federal Services Corporation, which provides federal-sector clients diverse infrastructure services. The HNTB Companies employ more than 3,400 people in more than 60 offices nationwide.