The nearly completed headquarters of the US Food and Drug Administration is located in White Oak, Maryland, near the the edge of Washington, DC. This 9000 employee office and laboratory campus has been under construction for almost a decade and is one of the largest government construction projects in history. The FDA regulates companies that make up fully a quarter of the US economy, making the size of the institution more understandable. Under the guidance of Rod Henderer and Douglas Palladino at RTKL Associates (in a joint venture with Kling Stubbins), this facility exhibits some of the most sophisticated and timeless modern architecture currently being built in the greater District area.
Full disclosure: The author of The Straight Torquer worked on this project.