If my research is correct, this is the Potomac Tower in Rosslyn, Virginia designed by James Ingo Freed. Here's a little more about Freed:
"James Ingo Freed (June 23, 1930 – December 15, 2005) was an American architect born in Essen, Germany during the Weimar Republic. After coming to the United States at age nine with his sister Betty, followed later by their parents, he studied at the Illinois Institute of Technology, where he graduated with a degree in architecture.
In the late 1970s, he was a member of the Chicago Seven and dean for three years of the School of Architecture at his alma mater. He worked for most of his career based in New York, and went beyond the Internationalist and modernist styles. In partnership with I.M. Pei, in their firm known as Pei Cobb Freed & Partners, he worked on major United States public buildings and museums." ~ Wikipedia