The ship’s namesake, Col. Harvey "Barney" Barnum, Jr. (USMC, Ret.) and his wife and ship sponsor, Martha Hill, attended the event. Acting Secretary of the Navy, Thomas W. Harker, Maine Senators Susan Collins and Angus King, Jr. and Member of the House of Representatives from Maine, Chellie Pingree were also in attendance.  

With the assistance of BIW welder Marty Fish, Col. Barnum inscribed his signature onto the keel plate.  As the sponsor, Martha Hill authenticated the keel by etching her initials into the keel plate, a tradition that symbolically recognizes the joining of modular components and the ceremonial beginning of the ship.

Col. Barnum twice served in Vietnam and is a Medal of Honor recipient for heroic actions taken against communist forces at Ky Phu in Quang Tin Province in December 1965 after his company came under enemy fire and was separated from the rest of their battalion.

DDG 124 is a Flight IIA destroyer equipped with Aegis Baseline 9, which provides improved Integrated Air and Missile Defense capabilities, increased computing power, and radar upgrades that improve detection range and reaction time against modern air warfare and Ballistic Missile Defense threats.

BIW is also in production on the future Arleigh Burke-class destroyers Carl M. Levin (DDG 120), John Basilone (DDG 122), Patrick Gallagher (DDG 127), and Flight III ships, Louis H. Wilson, Jr. (DDG 126), and William Charette (DDG 130), as well as the future Zumwalt-class destroyer, Lyndon B. Johnson (DDG 1002).

As one of the Defense Department's largest acquisition organizations, PEO Ships is responsible for executing the development and procurement of all destroyers, amphibious ships, special mission and support ships, boats and craft.