The Department of Energy is issuing a Special Notice regarding an extension to the Indefinite Delivery Indefinite Quantity (IDIQ) Contract DE-ET0000001 for a duration of nine months. This extension is in accordance with the Competition in Contracting Act, allowing for other than full and open competition due to the presence of a single responsible source that meets the agency's requirements. The services sought fall under the category of Other Scientific and Technical Consulting Services, which are critical for supporting the agency's technical and engineering needs. Interested parties can reach out to Lars Hankin at lars.hankin@hq.doe.gov or call 240-474-8607 for further information regarding this opportunity.