The Department of Defense, specifically the U.S. Army Corps of Engineers (USACE) Engineering Research and Development Center-Construction Engineering Research Laboratory (ERDC-CERL), is seeking to establish a five-year Blanket Purchasing Agreement (BPA) for the maintenance, repair, and calibration of the unique Tri-axial Earthquake and Shock Simulator (TESS) facility in Champaign, Illinois. This procurement aims to ensure the operational integrity of a specialized system that includes a shake table, load frames, hydraulic power supply, and control electronics, which is critical for conducting earthquake simulation research. The BPA is intended to be awarded on a sole source basis to MTS Systems Corporation, the original manufacturer, due to their proprietary knowledge and the necessity for qualified personnel to maintain the equipment. Interested parties may submit capability statements to CERL-CT-QUOTES@usace.army.mil by the specified deadline, although this notice does not constitute a request for competitive quotations.