Samuel Bryce enlisted in the Marine Corps in January of 1994. He completed recruit training at Marine Corps Recruit Depot, Parris Island, SC, and was assigned as a rifleman at Marine Corps Security Force Company, Panama. While in Panama, he participated in Operation Safe Haven, building refugee camps for approximately 8,500 Cuban refugees temporarily housed in the Panama Canal Zone, and participating in riot control when disturbances broke out. Upon the disestablishment of the Security Force Company in June of 1995, Lance Corporal Bryce was transferred to the Fleet Antiterrorism Security Team (FAST) Company in Norfolk, Virginia. While at FAST, he deployed on security missions to Haiti and to Bahrain and rose to the rank of sergeant.
Sergeant Bryce completed Officer Candidate School at Marine Corps Base, Quantico, Virginia in December of 1997, and was commissioned a second lieutenant. After completing The Basic School and Infantry Officers Course, he was assigned to First Battalion, Fifth Marines at Camp Pendleton, California. While there, he served as a rifle platoon commander, 81mm mortar platoon commander, Weapons Company executive officer, and Weapons Company commanding officer. He deployed with the battalion twice as part of the 31st Marine Expeditionary Unit, including service in Okinawa, Australia, the Philippines, and East Timor. In January of 2002 he was promoted to the rank of captain.
In March of 2002, Captain Bryce was transferred to Washington, DC and assigned as the Assistant Liaison to the House of Representatives, where he served until July of 2004. Following this tour, he attended the Expeditionary Warfare School in Quantico, Virginia.
In June of 2005, Captain Bryce was transferred to Camp Lejeune, North Carolina for service with First Battalion, Second Marines. He was initially assigned as assistant operations officer and deployed to Iraq in this capacity, serving in the city of Hit in Anbar province. Upon returning, he was assigned as a rifle company commander. Following this assignment, he was selected to lead an advisor team to an Iraqi Army battalion and deployed in this duty to Anbar province, Iraq, from January to August of 2007. In December of 2007, he was promoted to the rank of major.
In January of 2008, Major Bryce was transferred to the National Geospatial-Intelligence Agency (NGA) in Reston, Virginia. There he served as the deputy chief of the NGA Support Team to the Marine Corps.
In July of 2011, Major Bryce was transferred to Camp Pendleton, California and assigned as the operations officer for Second Battalion, Fifth Marines. In this capacity he deployed to Afghanistan in 2012, serving in the Musa Qaleh and Now Zad districts of Helmand province. Upon returning from Afghanistan, Lieutenant Colonel Bryce was assigned to the First Marine Logistics Group (MLG), where he served as the director of the Combat Skills Training School, and as the MLG training officer. In July of 2014, Major Bryce was transferred to Quantico, Virginia and assigned to Weapons Training Battalion, where he currently serves as executive officer. In September 2014 he was promoted to the rank of lieutenant colonel.
His personal awards include the Bronze Star Medal, the Defense Meritorious Service Medal, the Meritorious Service Medal, the Navy and Marine Corps Commendation Medal (with gold star in lieu of second award), the Army Commendation Medal, and the Navy and Marine Corps Achievement Medal.