How do you design a new FBI headquarters space? Ask your employees.

The future FBI workspace may be decided over a ham sandwich.

The FBI’s new suburban headquarters will feature workspaces, furniture and equipment of the future, crafted to produce a collaborative, cutting-edge environment for the agency’s 11,000 employees. The design of those spaces will begin in a 2,800-square-foot lab space adjacent to cafeteria at the current J. Edgar Hoover downtown headquarters, within full, purposeful view of FBI employees on their lunch breaks.

The Justice Department is…