Sierra Space Successfully Completes Critical Design Review for Missile Tracking Satellites in SDA Tranche 2

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LOUISVILLE, Colo.--(BUSINESS WIRE)--Sep 29, 2025--

Sierra Space, a Defense Tech company delivering solutions for the nation’s most critical missions and advancing the future of security in space, announced today the successful completion of the Critical Design Review (CDR) for the Space Development Agency’s (SDA) Tranche 2 Tracking Layer (T2TRK), affirming technical readiness to begin production of advanced missile tracking satellites for the Proliferated Warfighter Space Architecture (PWSA).

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Sierra Space Successfully Completes Critical Design Review for Missile Tracking Satellites in SDA Tranche 2 (Photo: Sierra Space)

Under this contract, Sierra Space will deliver two orbital planes of satellites—18 in total—equipped with state-of-the-art infrared sensors to detect and track ballistic, hypersonic, and next-generation threats. Each constellation plane will host multiple missile warning/tracking IR sensors to include a missile defense sensor, forming a resilient layer of early threat detection for U.S. and allied forces.

“Our successful completion of CDR demonstrates Sierra Space’s ability to deliver innovative solutions at speed to support the nation’s defense initiatives,” said Erik Daehler, Senior Vice President of Sierra Space Defense. “We’re proud to support the SDA’s vision with space systems purpose-built for protecting against emerging threats.”

With the completion of CDR, Sierra Space now moves into the assembly, integration and testing phase for T2TRK, with hardware already arriving at its state-of-the-art manufacturing facility Victory Works. The company’s focus on high-rate production enables it to provide our constellation class Horizon spacecraft to our customers with the speed and quality needed to ensure mission success.

Sierra Space's success in the T2TRK program highlights its evolution as a next-generation defense leader, merging commercial agility with deep space system engineering expertise. With over 30 years of space flight heritage and a track record of 500 missions, Sierra Space continues to deliver innovative solutions that meet the needs of the U.S. Department of Defense and allied partners.

About Sierra Space

Headquartered in Colorado, Sierra Space is a Defense Tech company delivering satellite platforms, subsystems, reusable spaceplanes, hypersonic technologies, propulsion systems, and space infrastructure for the nation’s most critical missions.

With more than three decades of experience and flight-proven success in space, Sierra Space provides services to the U.S. National Security and Civil customers, and global allies. Our technologies serve to safeguard our nation, sustain human exploration in space, and preserve the freedom of operations beyond Earth.

Sierra Space is dedicated to defining the new era of Space Defense, strengthening deterrence today and preserving freedom of action for generations to come.

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CONTACT: MEDIA CONTACTS:

ExtSierraSpaceTeam@extensionpr.com

KEYWORD: UNITED STATES NORTH AMERICA COLORADO

INDUSTRY KEYWORD: SATELLITE DEFENSE OTHER DEFENSE MILITARY TECHNOLOGY AEROSPACE GOVERNMENT TECHNOLOGY MANUFACTURING

SOURCE: Sierra Space

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PUB: 09/29/2025 10:39 AM/DISC: 09/29/2025 10:38 AM

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