The 249th Engineer Battalion (Prime Power) is a versatile power generation battalion assigned to the U.S. Army Corps of Engineers that provides commercial-level power to military units and federal relief organizations during full-spectrum operations. Additionally, the commander serves as the Commandant of the U.S. Army Prime Power School, the institution responsible for the development of Army and Navy power generation specialists.

The battalion's motto is “Build, Support, Sustain”.

On order, deploy worldwide to provide prime electrical power and electrical systems expertise in support of military operations and National Response Plan.

The 249th Engineer Battalion also supports other missions:

The 249th Engineer Combat Battalion was constituted on 5 May 1943 at Camp Bowie, Texas. The battalion was organized and under the command of only three captains. The other officers that were supplied to the unit were second lieutenants from the 1943 class of West Point. Shortly after, the battalion participated in two maneuvers in Louisiana, known as the “Louisiana Maneuvers”; there the battalion and its soldiers learned valuable lessons for war.