Colonel Gabrielle M. Hermès was raised in Hibbing, Minnesota. She enlisted in the U.S. Air Force in 1987 and served in various enlisted aide and administrative positions within the Strategic Air Command in California. Immediately following her enlistment, she attended William Jewell College in Liberty, Missouri, graduating with a Bachelor of Arts degree in Communication (summa cum laude) in June 1995 and was commissioned a Second Lieutenant in the U.S. Marine Corps. Upon completion of The Basic School in Quantico, Virginia, she attended the Defense Information School, Fort Meade, Maryland, and became a Public Affairs Officer.
From June 1996 to July 1998, Second Lieutenant Hermès served as the Public Affairs Officer for the 2d Marine Division, Camp Lejeune, North Carolina. In August 1998, First Lieutenant Hermès transferred to become the Public Affairs Officer for the 26th Marine Expeditionary Unit (MEU). During two Mediterranean deployments, Captain Hermès served in Operations’ Noble Anvil/Joint Task Force Shining Hope, Joint Guardian, Avid Response, and Joint Forge where the MEU responded to an earthquake in Turkey, conducted humanitarian relief efforts in Albania, and was the first major U.S. ground force into Kosovo.
In May 2001, Captain Hermès graduated with a Master of Arts degree in Human Resource Management (summa cum laude), Webster University. In July 2001, she served as the Public Affairs Officer for the Marine Corps Combat Development Command, Quantico, Virginia.
In October 2003, Captain Hermès was selected as a Congressional Fellow in the office of Senator Jack Reed (D-RI) where she worked on defense and foreign policy issues. She also completed the Georgetown University program in Legislative Affairs.
From December 2004 to January 2007, Major Hermès served as a Public Affairs Officer at the Headquarters Marine Corps Public Affairs office in the Pentagon. During her tour, she served as the Public Affairs Officer to the Commandant of the Marine Corps and the Assistant Commandant of the Marine Corps. During this tour she graduated with a Master of Arts degree in Communication (magna cum laude) from the University of Oklahoma.
In February 2007, Major Hermès transferred to Marine Corps Recruit Depot, Parris Island, South Carolina, where she was the Public Affairs Director for the Depot and Eastern Recruiting Region (ERR). In June 2008, Major Hermès deployed to Iraq with the 1st Marine Expeditionary Force (Forward) as the Deputy, Public Affairs Director for Multi-National Forces West, overseeing all media operations in Al Anbar Province. Following her deployment she resumed duties as the Public Affairs Director for the Depot and ERR until February 2010.
In March 2010, Major Hermès assumed duties as the 1st Marine Expeditionary Force (I MEF) Public Affairs Director at Camp Pendleton, California. In September 2010 she deployed to Afghanistan as the Public Affairs Director for Regional Command Southwest where she was in charge of all NATO media operations in Helmand Province. Following her deployment she resumed duties as the I MEF Public Affairs Director until May 2012.
In June 2012, Lieutenant Colonel Hermès took command of the 4th Recruit Training Battalion (RTBN), Marine Corps Recruit Depot, Parris Island. She finished her command in July 2014 and attended the National War College, National Defense University, Ft McNair, Washington, D.C. She graduated in June 2015 with a Master of Science degree in National Security Strategy.
Immediately following school, Lieutenant Colonel Hermès she served as the Defense Department Spokesperson for all Personnel and Readiness issues, to include: Force-of-the-Future initiatives, Women in Combat, Transgender, Sexual Assault, Suicide, and Health Affairs. She completed her tour in June 2017 and immediately assumed duties with the Marine Corps office of Legislative Affairs as a Manpower and Reserve Affairs Liaison to the House and Senate.
In August 2018, Colonel Hermès transferred to Fleet Marine Force Atlantic, Marine Forces Command, Marine Forces Northern Command, Norfolk, Virginia and assumed duties as the Assistant Chief of Staff, Communication Strategy and Operations. In June 2021 she assumed command of the Headquarters and Service Battalion.
Colonel Hermès personal awards include the Defense Meritorious Service Medal, Meritorious Service Medal with silver star in lieu of sixth award, Navy and Marine Corps Commendation Medal with gold star in lieu of second award, Navy and Marine Corps Achievement Medal, and Combat Action Ribbon.