Seabee Engineer Reconnaissance Teams (SERTs) are a new organizational concept developed by the First Naval Construction Division (1st NCD) during Operation Iraqi Freedom intended to provide more engineering capability on the battlefield in support of the United States Marine Corps. SERTs are composed of ten-member teams: two Civil Engineer Corps (CEC) officers and eight enlisted Seabees, augmented with additional personnel, as missions require. The OIC is normally a licensed professional engineer with civil/structural engineering background. All SERT units include a Navy Corpsman.