The Corps of Engineers (ENGR) is the military engineering branch of the Defence Forces of Ireland. The Corps is responsible for combat engineering, construction engineering, and fire fighting services within the Defence Forces. The main role of the combat engineers is to provide engineering on the battlefield; the Corps has successfully leveraged its skill and expertise in several of the Irish Army's deployments on United Nations operations.

Military engineering is loosely defined as the art, science, and practice of designing and building military works and maintaining lines of military transport and military communications. Military engineers are also responsible for logistics behind military tactics. Modern military engineering differs from civil engineering. In the 20th and 21st centuries, military engineering also includes CBRN defense and other engineering disciplines such as mechanical and electrical engineering techniques.