Linda St. Thomas, the spokeswoman for the Smithsonian Institution, said the worker, who was employed by a drywall contractor, fell from a hoist.
Vito Maggiolo, a spokesman for the D.C. Fire and Emergency Medical Services Department, said the male worker was taken to a hospital. A police spokeswoman said the man died.
The worker’s name was not immediately made public pending notification of relatives, according to D.C. police.
St. Thomas said the man lived in District Heights in Prince George’s County. She said he worked for Component Drywall, a subcontractor for Clark, Smoot and Consigli construction companies, which are leading the project as part of a joint venture.
“Our deepest sympathies are with this gentleman’s family, friends, and co-workers during this incredibly difficult time,” read a statement from those companies. “We take all matters involving the safety of our workforce, our job sites, and the public seriously.”
D.C. police and regulatory agencies, including the federal Occupational Safety and Health Administration, are investigating the incident.