The practice of planning, supervising, or executing the construction of new sites. Engineering specialists in the U.S. military belong to the U.S. Army Corps Engineers, and their duties range from building new bases on the battlefield to developing military and public infrastructure back on home soil. For example, engineering specialists in the U.S. military are heavily involved in managing the public water supply, maintaining dams and minimizing the risk of flooding.

The U.S. Army Corps of Engineers owns and operates many of the country's hydroelectric power stations. Engineering specialists are called on in times of crisis, such as a major flood or a hurricane, to limit the damage caused, help with the clear-up operations and re-establish vital services such as the drinking water supply. They are responsible for putting flood defenses in place to prevent future floods from causing further damage.

Engineering specialists are responsible for building and maintaining the barracks and training camps that are used by troops. Combat engineering specialists may be deployed to the front line to solve engineering problems on the ground, such as establishing supply routes, building temporary bases, and fortifying existing camps to protect the soldiers who are based there. They also play a role in rebuilding infrastructure in places that have been affected by combat.

Engineering specialists must pass through several stages of training. They must meet strict physical requirements as this job requires high levels of fitness. To train as an engineering specialist, at least two years of high school mathematics are required.