The HNTB Corp. leased at 2900 South Quincy St. in Arlington, VA. The HNTB Corp. provides architecture, engineering, planning, and construction services worldwide. It will occupy 43,154 square feet for 10 years. The property is a 233,000-square-foot, Class-A office building, also known as Quincy Tower. David Millard, Peter Berk, and Josh Masi of Transwestern Commercial Services represented the landlord, Transwestern Investment Company LLC. Manny Fitzgerald of Insignia/ESG Inc. represented The HNTB Corp.