Gulick was then transferred to the Headquarters Marine Corps in Washington, D.C., for instruction in the Paymaster Department under Brigadier General Russell B. Putnam.
He completed the instruction in November 1940 and assumed duty as Paymaster, Marine Barracks, Naval Base Guantanamo, Cuba.
In this capacity, he was responsible for providing financial services such as monthly payrolls, controlling disbursing and logistical activities.
He was promoted to the rank of lieutenant colonel in March 1941.

Gulick was transferred back to the United States in September 1942 for duty as paymaster of the Southern Pay Area at Pensacola, Florida.
He was promoted to the temporary rank of colonel in November 1942.
He was transferred to Hawaii in September 1943 and served as deputy to paymaster of the Fleet Marine Force, Pacific, Brigadier General Merritt B. Curtis.
Gulick remained in that assignment until the end of war and received the Navy Commendation Medal by Commanding general, FMFPac, Holland Smith.

In July 1945, Gulick was ordered to the Marine Corps Base San Diego and served again as paymaster of the base under Major General Earl C. Long.
He then returned to the Headquarters Marine Corps in Washington, D.C., for duty in the Office of Paymaster General under Major General Raymond R. Wright.
When Paymaster Department of the Marine Corps was merged into the Quartermaster Department in July 1946, all previous paymaster department's responsibilities were transferred to the Disbursing Branch, Supply Department.
Gulick also was transferred to that department and remained there until June 1948.

Gulick was subsequently ordered to the Marine Corps Supply Activity Philadelphia under Brigadier General Leonard E. Rea and appointed officer in charge of General Supply Division.
The facility in Philadelphia served to procure, store, maintain, distribute and manufacture uniforms and minor equipage, and Gulick remained there until May 1949, when he was sent to the Marine Corps Recruit Depot Parris Island, South Carolina.

He served for four years as supply officer and assistant chief of staff, G-4 (Supply) under Major General Alfred H. Noble until he was ordered for the course at the Industrial College of the Armed Forces in August 1953.
Gulick completed the course in February 1954 and was promoted to the rank of brigadier general.

With the promotion to general's rank, Gulick was ordered to California and assumed command of Marine Corps Depot of Supplies at San Francisco.
He served as the last commanding general of that installation until July 1954 and supervised the moving of it to the Marine Supply Center Barstow.
The Barstow Center served for rebuilding and repairing of ground-combat and combat-support equipment and to support installations on the West Coast of the United States.

Gulick served in that capacity until January 1957, when he succeeded Brigadier General Ion M. Bethel as commanding general of Marine Supply Center Albany.
This center had the same role as Barstow center, but only within the East Coast of the United States.

He was promoted to the rank of major general in July 1958 and appointed Quartermaster General of the Marine Corps and was responsible for the support of development, production, acquisition, and sustainment of general supply, Mortuary Affairs, subsistences, petroleum and water, material and distribution management during peace and war to provide combat power to the U.S. Marine Corps units.
Gulick was then transferred to the Headquarters Marine Corps in Washington, D.C., for instruction in the Paymaster Department under Brigadier General Russell B. Putnam. He completed the instruction in November 1940 and assumed duty as Paymaster, Marine Barracks, Naval Base Guantanamo, Cuba. In this capacity, he was responsible for providing financial services such as monthly payrolls, controlling disbursing and logistical activities. He was promoted to the rank of lieutenant colonel in March 1941.
Gulick was transferred back to the United States in September 1942 for duty as paymaster of the Southern Pay Area at Pensacola, Florida. He was promoted to the temporary rank of colonel in November 1942. He was transferred to Hawaii in September 1943 and served as deputy to paymaster of the Fleet Marine Force, Pacific, Brigadier General Merritt B. Curtis. Gulick remained in that assignment until the end of war and received the Navy Commendation Medal by Commanding general, FMFPac, Holland Smith.
In July 1945, Gulick was ordered to the Marine Corps Base San Diego and served again as paymaster of the base under Major General Earl C. Long. He then returned to the Headquarters Marine Corps in Washington, D.C., for duty in the Office of Paymaster General under Major General Raymond R. Wright. When Paymaster Department of the Marine Corps was merged into the Quartermaster Department in July 1946, all previous paymaster department's responsibilities were transferred to the Disbursing Branch, Supply Department. Gulick also was transferred to that department and remained there until June 1948.
Gulick was subsequently ordered to the Marine Corps Supply Activity Philadelphia under Brigadier General Leonard E. Rea and appointed officer in charge of General Supply Division. The facility in Philadelphia served to procure, store, maintain, distribute and manufacture uniforms and minor equipage, and Gulick remained there until May 1949, when he was sent to the Marine Corps Recruit Depot Parris Island, South Carolina.
He served for four years as supply officer and assistant chief of staff, G-4 (Supply) under Major General Alfred H. Noble until he was ordered for the course at the Industrial College of the Armed Forces in August 1953. Gulick completed the course in February 1954 and was promoted to the rank of brigadier general.
With the promotion to general's rank, Gulick was ordered to California and assumed command of Marine Corps Depot of Supplies at San Francisco. He served as the last commanding general of that installation until July 1954 and supervised the moving of it to the Marine Supply Center Barstow. The Barstow Center served for rebuilding and repairing of ground-combat and combat-support equipment and to support installations on the West Coast of the United States.
Gulick served in that capacity until January 1957, when he succeeded Brigadier General Ion M. Bethel as commanding general of Marine Supply Center Albany. This center had the same role as Barstow center, but only within the East Coast of the United States.
He was promoted to the rank of major general in July 1958 and appointed Quartermaster General of the Marine Corps and was responsible for the support of development, production, acquisition, and sustainment of general supply, Mortuary Affairs, subsistences, petroleum and water, material and distribution management during peace and war to provide combat power to the U.S. Marine Corps units.
Roy M. Gulick