The Department of Defense, through the Department of the Army, is soliciting proposals for the ECSO Unrestricted Vertical Construction Multiple Award Task Order Contract (MATOC), aimed at providing design-build and design-bid-build vertical construction services for the Department of Homeland Security's Customs and Border Protection facilities along the southern borders of California, Arizona, New Mexico, and Texas. This procurement will support a maximum construction capacity of $1.5 billion over a five-year base period with two additional option years, with individual task orders not exceeding $150 million. The MATOC is crucial for enhancing border security infrastructure and will be available for use by non-DHS programs within the Southwestern Division's boundaries. Interested contractors must register in the System for Award Management (SAM) and are encouraged to contact Christopher Preston at christopher.r.preston@usace.army.mil or Nicholas Johnston at nicholas.i.johnston@usace.army.mil for further details.