Our Mission
S4S, with its Allies and partners, commands combat forces in space superiority operations to protect and defend USSPACECOM’s Area of Responsibility and to deliver global space-enabled effects to the Joint Force.


S4S mission - Protect, Defend, Deliver, Connect

S4S Featured Stories
This graphic shows a 2D rendering of the lifecycle of S4S support to human spaceflight, from launch to ISS docking to return

How S4S-CJFSC supports human spaceflight, NASA
Five military members stand in front of a large tunnel in the side of a mountain

S4S command team visits Colorado's Front Range
Five military members gather around a wargaming table with a world map and pieces to represent simulated assets

S4S leads the way in largest, most realistic Space Flag yet
S4S Current News
The National Space Defense Center, one of five U.S. Space Forces-Space operation centers, employs the 18th and 19th Space Defense Combat Squadrons to function as a hub for foundational space awareness. Together, they detect, process, and analyze space events such as launches, reentries, deorbits, breakups, and on-orbit maneuvers, while assessing and predicting potential collision risks. (U.S. Space Force graphic by David Dozoretz)
How S4S-CJFSC supports human spaceflight, NASA
By U.S. Space Forces - Space | Feb. 18, 2026
When NASA’s Crew-12 launched aboard SpaceX’s Dragon spacecraft from Cape Canaveral Space Force Station on Feb. 13, 2026, space operators from the 18th and 19th Space Defense Combat Squadrons played a vital role in ensuring...
From left to right, U.S. Space Force Senior Master Sgt. Matthew Myers, Missile Warning Center senior enlisted leader; Chief Master Sgt. Tina Timmerman, U.S. Space Forces-Space (S4S) command senior enlisted leader; Lt. Gen. Dennis Bythewood, S4S commander and Combined Joint Force Space Component commander; U.S. Navy Capt. Jermaine Brooms, MWC director; and Ms. Brenda Courcy, MWC deputy director, stand in front of the Cheyenne Mountain Complex on Cheyenne Mountain Space Force Station, Colo., Jan. 26, 2026. The mission of the MWC is to monitor, detect, and disseminate real-time missile warning data to U.S. combatant commands and coalition partners. The MWC immersion was part of the S4S command team’s efforts to visit Guardians at several component locations across the country over a three-week period, including at Schriever SFB, the Missile Warning Center and the 1st Space Brigade in Colo. (U.S. Space Force photo by Staff Sgt. Jaime Sanchez)
S4S command team visits Colorado's Front Range
By U.S. Space Forces-Space Public Affairs | Jan. 27, 2026
U.S. Space Force Lt. Gen. Dennis Bythewood, U.S. Space Forces-Space (S4S) commander and Combined Joint Force Space Component commander, and Chief Master Sgt. Tina Timmerman, S4S command senior enlisted leader, visited...
U.S. Space Force Guardians assigned to Space Delta 5 talk through a scenario during Space Flag 26-1 at the Combined Space Operations Center on Vandenberg Space Force Base, Calif., Dec. 19, 2025. Space Flag is the USSF’s premier space warfare training exercise where participants trained to defeat realistic threats and maintain space superiority in a contested environment. (U.S. Space Force photo by David Dozoretz)
S4S leads the way in largest, most realistic Space Flag yet
By Capt. Cameron Silver | Jan. 14, 2026
Guardians assigned to U.S. Space Forces-Space (S4S) headquarters, the Combined Space Operations Center and the National Space Defense Center recently wrapped up Space Flag 26-1—the latest and largest iteration of the U.S...
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U.S. Space Command News
From left, Col. Raymond Ruscoe, U.S. Space Command “South Detachment” deputy director; Maj. Gen. Terry Grisham, USSPACECOM transition team director; and Gen. Stephen Whiting, USSPACECOM commander, listen to a briefing during a tour of facilities at Redstone Arsenal, Alabama, Jan. 29, 2026. Following the President's announcement in September 2025, the command has been working diligently to lay the groundwork for a purpose-built headquarters on Redstone Arsenal while remaining committed to ensuring seamless space operations. The first members of USSPACECOM’s headquarters staff are already on the ground at Redstone Arsenal, forming a dedicated Project Management Office focused on military construction and infrastructure.
Alabama native Maj. Gen. Terry Grisham leads USSPACECOM’s transition to Redstone Arsenal
By | Feb. 4, 2026
Maj. Gen. Terry L. Grisham, a long-time Alabama native with nearly 40 years of military and civilian service, is spearheading U.S. Space command’s relocation to Redstone Arsenal as the director of the transition team. His...
Gen. Stephen Whiting, U.S. Space Command commander, welcomes Maj. Gen. Terry Grisham as the new USSPACECOM transition team director at Redstone Arsenal, Alabama, Jan. 29, 2026. Following the President's announcement in September 2025, the command has been working diligently to lay the groundwork for a purpose-built headquarters on Redstone Arsenal while remaining committed to ensuring seamless space operations. The first members of USSPACECOM’s headquarters staff are already on the ground at Redstone Arsenal, forming a dedicated Project Management Office focused on military construction and infrastructure.
Press Release: USSPACECOM announces General Officer, Alabama native to serve as headquarters transition team director
By | Jan. 29, 2026
Gen. Stephen Whiting, USSPACECOM commander, announced today that Maj. Gen. Terry L. Grisham, a long-time Alabama native with nearly 40 years of military and civilian service, will serve as the command’s transition team...
Lt. Gen. Zellmann, U.S. Space Command deputy commander, receives a demonstration of a small form factor kit during a visit to 1st Space Brigade, U.S. Army Space and Missile Defense Command, headquarters at Fort Carson, Colorado, Jan. 6, 2026.
USSPACECOM deputy commander visits SMDC
By Jacob Walogo, U.S. Army Space and Missile Defense Command | Jan. 14, 2026
Lt. Gen. Richard Zellmann, deputy commander for U.S. Space Command, visited U.S. Army Space and Missile Defense Command units in Colorado and Alabama to assess new capabilities from one of USSPACECOM’s component commands...
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