The 15th Engineer Battalion is a Construction Effects battalion

Battalion

A battalion is a military unit of around 300–1,200 soldiers usually consisting of between two and seven companies and typically commanded by either a Lieutenant Colonel or a Colonel...

 of the United States Army

United States Army

The United States Army is the main branch of the United States Armed Forces responsible for land-based military operations. It is the largest and oldest established branch of the U.S. military, and is one of seven U.S. uniformed services...

. It is currently a subordinate unit of 18th Engineer Brigade

18th Engineer Brigade (United States)

The 18th Engineer Brigade is an engineer brigade of the United States Army. It is currently a subordinate unit of 21st Sustainment Command and is headquartered at Tompkins Barracks in Schwetzingen, Germany...

 and is headquartered at Conn Barracks in Schweinfurt

Schweinfurt

Schweinfurt is a city in the Lower Franconia region of Bavaria in Germany on the right bank of the canalized Main, which is here spanned by several bridges, 27 km northeast of Würzburg.- History :...

, Germany. Soldiers of the 15th Engineer Battalion provide various supportive duties to other Army units, including construction, engineering, and mechanical work on other Army projects.
The 15th is composed of four companies and one survey and design detachment (534th Bushmasters).