Dupont Circle Metro - The office is easily accessible by Metro or MetroBus (42 or L2/L1).
Metro - Take the Red Line to the Dupont Circle station and use the North (Q Street) exit. As you exit from the escalators, turn right to walk up (north) on Connecticut Avenue to S Street. Then turn right on S Street and the office entrance (labelled 1801) is on S Street, next to Thaiphoon Restaurant.