Robert Kenneth Lusk is a native of Los Angeles, California and enlisted in the Marine Corps on 1 July 1996 from his home town of Roseville, California. Upon completion of recruit training at Marine Corps Recruit Depot San Diego, California, Private Lusk attend Marine Combat Training, Infantry Training Battalion, Camp Pendleton, California.  Upon completion, he was promoted to Private First Class.  

Private First Class Lusk then attended the Ground Radio Repair Course, Marine Corps Air Ground Combat Center, 29 Palms California, where upon completion he obtained the Military Occupational Specialty (MOS)2841(Ground Radio Repairman) and was promoted to Lance Corporal.

Upon completion from school, Lance Corporal Lusk was transferred to 4th Motor Transport Maintenance Battalion, Sacramento California. In February 1999, he was promoted to Corporal.

In March 1999, Corporal Lusk was assigned to Marine Wing Support Squadron 473 Fresno, California, where he served as Ground Radio Repairman.  He filled additional billets such as Assistant Training Non-Commissioned Officer (NCO).  On 1 January 2001, he was promoted to Sergeant and in March was recognized as the NCO of the Quarter. 

In January 2002 Sergeant Lusk was assigned to 4th Force Reconnaissance Company, Reno. Nevada, where he served as Headquarters Platoon Sergeant and Company Armorer.  In July of 2003 he was reassigned to fill the billet of Company Radio Chief. 

In June of 2005, Sergeant Lusk was activated and attached to 2d Force Reconnaissance Company and deployed forward in support of Operation Iraqi Freedom.  Sergeant Lusk was assigned as 7th Reconnaissance Platoon Communications Chief.  On 1 September 2005 he was promoted to Staff Sergeant. 

In August of 2007 Staff Sergeant Lusk was again activated in support of Operation Iraqi Freedom and in April of 2008 was deployed forward and attached to 3d Reconnaissance Battalion.  Staff Sergeant Lusk was assigned as 1st Platoon, Echo Company, Communications Chief.
In March of 2009 Staff Sergeant Lusk completed the Radio Chief Course in 29 Palms, California where he earned the 0629 MOS.

Promoted to Gunnery Sergeant in June of 2009, he served as the Communications Chief, 4th Force Reconnaissance Company, Alameda, California. In May of 2011 Gunnery Sergeant Lusk was assigned as the Communications Chief and stood up Special Purpose Marine Air Ground Task Force 12 Naval Air Station Sigonella, Italy.  During the deployment he served as Platoon Sergeant and Platoon Commander, deploying forward to Africa in support Operation Enduring Freedom.  

In May of 2013 he was promoted to First Sergeant and reported to Company D, 4th Reconnaissance Battalion, 4th Marine Division, Albuquerque, New Mexico. 

In May of 2017 First Sergeant Lusk was assigned as Company First Sergeant, Headquarters Company, 23d Marine Regiment, San Bruno, California. 

In May of 2018 he was promoted to Sergeant Major and assigned to 4th Force Reconnaissance Company, 4th Marine Division, Alameda, California. 

In March of 2020 Sergeant Major Lusk was assigned to 3d Force Reconnaissance Company, 4th Marine Division, Mobile, Alabama.

Sergeant Major Lusk’s personal awards include the Navy and Marine Corps Commendation Medal with Gold Star in lieu of second award, the Navy and Marine Corps Achievement Medal with Combat distinguishing device, Combat Action Ribbon and Outstanding Volunteer Service Medal.