Investigators described the sex assault suspect as a 20 to 30 year old olive-skinned man. He was approximately 5'8" - 5'10" and 160 pounds.
Science Museum of Virginia Director Richard Conti said Capitol Police were called after the incident was reported.
"The Museum has provided security footage and is cooperating with the investigation," he said.
Police have not yet commented on the age of the alleged victim.
This is a developing story, so anyone with more information can submit a news tip here.
Anyone who knows the man in the photo was asked to call Sgt. Tony Gulotta at 804-786-2505 or 804-786-2120.