EnduroSat & Shield Space Partner for Rapid Space Defense Missions

Sofia, Bulgaria / London, UK — April 2025 — EnduroSat, a space infrastructure builder, and Shield Space, a veteran-found UK defense technology company, have entered into a strategic partnership to deliver rapidly deployable counter-threat space missions for NATO and allied Defence customers. The partnership provides a path for defense organizations to move from contract signature to on-orbit operations in as little as nine months, overcoming the multiyear delays that limit traditional programs.

Allied forces today face an accelerating threat environment, yet many defence space programmes still require years to progress from concept to orbit. These timelines make it difficult for customers to field responsive spacecraft capable of conducting rendezvous and proximity operations (RPO), protecting critical orbital infrastructure and responding to emerging threats.

The EnduroSat × Shield Space partnership directly addresses this gap by fusing Shield Space’s mission level autonomous RPO guidance and effector payloads, with EnduroSat’s flight proven, software flexible satellite platforms and end-to-end space services.

This allows the companies introduce a mission as a product approach for defense customers — delivering fully integrated spacecraft, orbital deployment, mission software, and operations as a single package, making the delivery of operationalised Space Defence missions in as little as nine months possible.

The partnership’s first mission, BROADSWORD, launches in Q2 2027 and serves as the initial proof point for this new operational model. BROADSWORD features an 8U autonomous chaser spacecraft conducting a full RPO sequence against a co-deployed 3U target. The mission demonstrates how Shield Space’s autonomy and effector ready architecture, paired with EnduroSat’s standardised satellite buses and fixed-cost space service, enables rapid Defence mission execution at a fraction of the cost of traditional providers.

The mission is part of a wider family of jointly developed concepts already presented & generating strong interest from senior command in allied nations, validating the partnership’s relevance to next-generation orbital security requirements.

Following BROADSWORD, EnduroSat and Shield Space are progressing their first joint operational capability for Defence customers: a mothership-based space control system designed to deploy, coordinate and support autonomous interceptor spacecraft in orbit. Developed under Project NEXUS, the system will provide a scalable mission architecture for customers requiring persistent orbital surveillance, distributed response options and the ability to maintain coverage across wider operational areas.

Built on EnduroSat’s high‑performance CubeSat and 200-500kg class satellite buses and integrated with Shield Space’s mission systems, the NEXUS capability is designed to act as a command, deployment and support node for multiple manoeuvrable spacecraft. This enables a single platform to carry and coordinate autonomous vehicles capable of inspection, tracking and other responsive proximity operations against objects of interest. By combining a mothership architecture with deployable interceptor spacecraft, the partnership will offer Defence users a more persistent and operationally flexible alternative to single-platform RPO missions.

Other missions in development focus on enhancing orbital situational awareness and rapid-response manoeuvrability, applying the same operational approach demonstrated by BROADSWORD: compact, highly capable spacecraft delivering precise guidance, navigation, and proximity effects while remaining cost-efficient and fast to field.

Across the mission line, the shared approach remains constant: use flight-proven, standardized spacecraft platforms as the backbone, pair them with advanced autonomy and effector‑ready payload interfaces, and deliver them through an end-to-end space service that covers everything from mission design and frequency licensing to launch and in-orbit operations. This enables allied forces to strengthen orbital security and manoeuvre freedom with systems designed for frequent deployment, iterative upgrade, and sustained operational relevance.