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Space Security Sentinel

Space Security Sentinel

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Space Security Sentinel (S3) is the essential briefing for professionals at the intersection of space, cybersecurity, and national defense. Delivered straight to your inbox monthly, each edition cuts through the noise to bring you mission-critical updates, expert insights, and emerging threat intelligence shaping the secure future of space.

Each edition of S3 is curated by Mark Holmes, Senior Editorial Director at Via Satellite and CyberSat Summit Program Chair, alongside Rachel Jewett, Senior Managing Editor at Via Satellite, and a network of trusted insiders on the frontlines of space and cyber defense. Closely aligned with the content and conversations of our partner event, CyberSat Summit (Nov. 2-5, 2026, in Reston, VA), S3 delivers a year-round pulse on the threats, technologies, and insights shaping space security today.

In an increasingly contested domain, awareness is your first layer of defense. S3 delivers the clarity, context, and foresight you need.

What You’ll Receive When You Subscribe:

  • Timely Analysis – Stay informed with sharp, digestible insights on the latest policies, vulnerabilities, and adversarial maneuvers in space.
  • Threat Intelligence – Track the trends and actors reshaping the domain—from cyber intrusions and GPS spoofing to anti-satellite testing and jamming activity.
  • Innovation Spotlights – Discover emerging tech, dual-use systems, and industry moves advancing resilience in orbit and on the ground.
  • Mission-Critical Perspectives – Hear directly from leaders in DOD, IC, commercial space, and cybersecurity about how they’re tackling today’s most pressing challenges.

  • Technology

    Scaling LEO satellite platforms for New Space

      Explore how LEO constellations are transforming satellite design for communications, imaging, navigation, and SAR. This application brief examines enabling technologies, including phased-array beamforming, optical inter-satellite links, advanced onboard processing, […]

  • SATELLITE

    RAD vs. COTS in the New Space Era

      As LEO constellations scale, engineering teams are balancing reliability, performance, manufacturability, and cost in entirely new ways. This whitepaper explores how RAD-hard, RAD-tolerant, and COTS component strategies are reshaping satellite architecture, supply […]