The National Gallery of Art in Washington, DC seeks a contractor for preventative maintenance and repair of various entrance, passage, and security doors across its East Building, West Building, Connecting Link, and Sculpture Garden. The contractor must provide all labor, equipment, and materials for services including preventive maintenance, adjusting, repair, and inspections on doors such as manual and automatic entries, oversized glass sliding doors, and security roll-up doors. The multi-year contract will be awarded to a single contractor, who may also manage subcontractors for specialized door issues. Interested parties should submit a statement of interest via email, including business details and capability statements. No specific budget, submission timeline, or bid deadline is mentioned in the description.