| As of 6 July 1940 |
| Chief, CWS |
Maj. Gen. Walter C. Baker |
| Executive Officer |
Lt. Col. Paul X. English |
| Chief, Personnel Division |
Lt. Col. Geoffrey Marshall |
| Chief, Information Division |
Lt. Col. John C. MacArthur |
| Chief, Training Division |
Lt. Col. Edward C. Wallington |
| Chief, Supply Division |
Maj. Norman D. Gillet |
| Chief, Procurement Division |
Lt. Col. George F. Unmacht |
| Chief, Fiscal Division |
Col. Arthur M. Heritage |
| Chief, Technical Division |
Lt. Col. Maurice E. Barker |
| As of 20 August 1941 |
| Chief, CWS |
Maj. Gen. William N. Porter |
| Executive Officer |
Lt. Col. Charles E. Loucks |
| Chief, Industrial Service |
Col. Paul X. English |
| Chief, Field Service |
Col. Edward Montgomery |
| Chief, Technical Service |
Lt. Col. Maurice E. Barker |
| Chief, Personnel Division |
Lt. Col. Geoffrey Marshall |
| Chief, Intelligence Division |
Capt. Thomas E. Rodgers |
| Chief, Fiscal Division |
Col. Arthur M. Heritage |
| Chief, Supply Division |
Maj. Norman D. Gillet |
| Chief, Plans Training Division |
Lt. Col. Crawford M. Kellogg |
| Chief, Troops Division |
Lt. Col. Charles S. Shadle |
| Chief, Incendiaries Branch |
Col. J. Enrique Zanetti |
| As of 1 May 1942 |
| Chief, CWS |
Maj. Gen. William N. Porter |
| Executive Officer |
Col. Charles E. Loucks |
| Chief, Industrial Service |
Brig. Gen. Paul X. English |
| Chief, Field Service |
Brig. Gen. Alexander Wilson |
| Chief, Technical Service |
Col. Edward Montgomery |
| Chief, Control Division |
Col. Lowell A. Elliott |
| Chief, Civilian Protection Division |
Col. George J. B. Fisher |
| Chief, Personnel Division |
Col. Geoffrey Marshall |
| Chief, Intelligence Division |
Col. John C. MacArthur |
| Chief, Legal Division |
Col. John A. Smith |
| As of 1 May 1942 |
| Chief, Fiscal and Planning Division |
Col. Arthur M. Heritage |
| Chief, Public Relations Division |
Maj. William 0. Brooks |
| Chief, Manufacturing Division |
Col. Patrick F. Powers |
| Chief, Procurement Planning Division |
Col. Hugh W. Rowan |
| Chief, Inspection Division |
Maj. Elwood H. Snider |
| Chief, Construction Division |
Lt. Col. Lester W. Hurd |
| Chief, Supply Division |
Col. Norman D. Gillet |
| Chief, Plans Training Division |
Col. Ralph G. Benner |
| As of 26 August 1943 |
| Chief, CWS |
Maj. Gen. William N. Porter |
| Executive Officer |
Col. Lowell A. Elliott |
| Assistant Chief, CWS, for Matériel |
Brig. Gen. Rollo C. Ditto |
| Assistant Chief, CWS, for Field Operations |
Brig. Gen. Alden H. Waitt |
| Chief, Control Division |
Col. Harry A. Kuhn |
| Chief, Personnel Division |
Col. Herrold E. Brooks |
| Chief, Fiscal Division |
Col. Arthur M. Heritage |
| Chief, Medical Division |
Col. Cornelius P. Rhoads |
| Chief, Industrial Division |
Brig. Gen. Paul X. English |
| Chief, Inspection Division |
Col. William M. Creasy |
| Chief, Supply Division |
Col. Norman D. Gillet |
| Chief, Technical Division |
Brig. Gen. William C. Kabrich |
| Chief, Field Requirements Division |
Col. George W. Perkins |
| Chief, Training Division |
Col. George J. B. Fisher |
| Chief, War Plans and Theaters Division |
Col. Herbert K. Bear |
| As of 11 December 1944 |
| Chief, CWS |
Maj. Gen. William N. Porter |
| Deputy Chief, CWS |
Col. Lowell A. Elliott |
| Executive Officer |
Col. Eric Lee |
| Assistant Chief, CWS, for Matériel |
Brig. Gen. Rollo C. Ditto |
| Assistant Chief, CWS, for Field Operations |
Brig. Gen. Alden H. Waitt |
| Chief, Control Division |
Col. Harry A. Kuhn |
| Chief, Personnel Division |
Col. Herrold E. Brooks |
| Chief, Fiscal Division |
Lt. Col. Joseph F. Escude |
| Chief, San Jose Projects Division |
Brig. Gen. Egbert F. Bullene |
| Chief, Medical Division |
Col. Cornelius P. Rhoads |
| Chief, Industrial Division |
Brig. Gen. Charles E. Loucks |
| Chief, Inspection Division |
Col. William M. Creasy |
| Chief, Technical Division |
Brig. Gen. William C. Kabrich |
| Chief, Supply Division |
Col. Norman D. Gillet |
| Chief, Field Requirements Division |
Col. Delancey R. King |
| Chief, Training Division |
Lt. Col. Franklin R. Williams |
| Chief, War Plans and Theaters Division |
Col. Herbert R. Bear |
| As of 30 June 1945 |
| Chief, CWS |
Maj. Gen. William N. Porter |
| Deputy Chief, CWS |
Col. Lowell A. Elliott |
| Executive Officer |
Col. Eric Lee |
| Assistant Chief, CWS, for Matériel |
Brig. Gen. Rollo C. Ditto |
| Assistant Chief, CWS, for Field Operations |
Brig. Gen. Alden H. Waitt |
| Chief, Control Division |
Col. Harry A. Kuhn |
| Chief, Personnel Division |
Cot Herrold E. Brooks |
| Chief, Fiscal Division |
Lt. Col. Joseph F. Escude |
| Chief, San Jose Projects Division |
Brig. Gen. Egbert F. Bullene |
| Chief, Medical Division |
Col. John R. Wood |
| Chief, Industrial Division |
Brig. Gen. Charles E. Loucks |
| Chief, Inspection Division |
Col. John R. Sharp |
| Chief, Technical Division |
Brig. Gen. William C. Kabrich |
| Chief, Supply Division |
Col. Norman D. Gillet |
| Chief, Field Requirements Division |
Col. Delancey R. King |
| Chief, Training Division |
Lt. Col. Franklin R. Williams |
| Chief, War Plans and Theaters Division |
Col. John C. MacArthur |
| Chief, Chemical Commodities Division |
Col. Samuel N. Cummings |