Airbus Defence and Space, a major division of the European aerospace giant, is a leading provider of military aircraft, space systems, and secure communications for NATO and global armed forces. Key products include the A400M airlifter, A330 MRTT tanker, Eurofighter, and advanced satellite imagery (Skynet/Oberon). It is central to European sovereignty, co-leading the Future Combat Air System (FCAS) and Eurodrone projects.

Allan Webb is a UK-based company and long-standing partner to the MOD, supporting all three services across all five warfighting domains. Our expertise in engineering supportability and digital services directly complements the Royal Signals’ mission of delivering secure communications and resilient information systems. Through our enduring support to programmes such as PICASSO and SKYNET, we help ensure critical capability remains available and future-ready.

Alpha 56 Solutions Ltd is a UK-based defence and security technology company specialising in tactical communications, secure networking, and TAK-enabled C2 integration. We support UK and allied government customers with deployable systems, training, and managed services across land, maritime, and expeditionary environments.

Arqit secures the world’s most critical data with quantum-safe encryption. Combining the security of PSKs with the flexibility of PKI, Arqit’s products are software-based, hyper-scalable, and NSA/NCSC guidance compliant, making them ideal for the evolving digital battlespace.

At Atos, we accelerate intelligence to help shape a responsible, secure and AI-powered digital future. By bringing together human, collective and artificial intelligence, we empower transformation–with speed, relevance and impact. From mission-critical environments to sovereign cloud, cybersecurity and AI-driven services, our technologies are seamless, secure, and built with sustainability at their core.

Babcock is an international defence company providing support and product solutions to enhance customers' defence capabilities and critical assets. We provide integrated, technology-enabled solutions to our defence customers in areas such as secure communications, electronic warfare and air defence.We also design and manufacture a range of defence and civil specialist equipment, from naval ship and weapons handling systems to liquid gas handling systems.

Digital Intelligence is home to over 4,500 digital, cyber and intelligence experts across 13 countries. We operate at the cutting edge of digital innovation and at the heart of organisations that keep vital infrastructure running, national security protected and armed forces prepared. Digital Intelligence is part of BAE Systems, which has a rich heritage in delivering technology today to protect our tomorrow.

Becrypt delivers high-assurance cybersecurity, purpose-built for the unique demands of the defence sector. We enable secure operations within contested digital environments, protecting mission-critical systems and sensitive data. Our flagship products are engineered to counter advanced threats. Utilising government-accredited security standards, our solutions allow defence organisations to safely adopt modern technologies—including secure mobile and cloud applications—without compromising operational integrity.

BlackTree was founded in 2012 by Neil Clements-Hill who served in the Royal Signals from 2000-2009. BlackTree's mission statement is "to provide resilient, secure communications for Global Operations". As the UK partner for TrellisWare Technologies, BlackTree does just that by providing market-leading tactical communications systems and technology to the UK MoD.

BMT is a maritime-orientated high-end design house and technical consulting firm, driven by a passion for solving complex, real-world problems that matter. It delivers design, engineering, and consulting excellence in a world of ever-increasing change: growing compliance, new global competitors, the pressure to do more with less, ever-faster innovation cycles and less time to exploit market positions or new technologies.

BT Defence is an established and innovative provider of ICT infrastructure and solutions to UK military, intelligence and security customers. The Defence Fixed Telecommunications Service (DFTS) is a private finance initiative (PFI) between the UK MoD and BT, enabling defence and industry partners to deliver and communicate flexibly, securely and seamlessly.

C3IA is a leading provider of technical and security services across public and private sectors, specialising in systems engineering, ICT, information assurance and NCSC-assured cyber services. The company plays a pivotal role in supporting the delivery of critical defence programmes and are trusted experts in mobile, deployable communications for challenging environments.

CDS bridges the gap between concept and operational capability, providing cutting-edge solutions for defence, government, security, and highly regulated industries. We deliver end-to-end solutions combining expertise in capability sustainment, digital engineering, training, cyber security and information assurance and support to operations. Our adaptable approach allows us to respond rapidly to emerging threats and challenges, providing innovative and scalable solutions from concept to readiness.

CGI provides comprehensive, scalable and sustainable IT and business consulting services that are informed globally and delivered locally. We work tirelessly to advise, build and operate bespoke, technically complex, mission-critical information systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability.

Aspiring to be a GovTech champion globally, making software that helps deliver critical services for citizens all around the world. Civica is proud to support the Royal Signals Institute in championing digital excellence and lifelong learning across the Armed Forces. Together, we’re working to secure, connected communications for today’s missions and tomorrow’s innovation.

Comrod Communication AS designs and manufactures tactical antennas, masts, mission systems, RF amplification, and combined antenna systems relied upon by defence, aerospace, and maritime organisations worldwide. Headquartered in Tau, Norway, with entities in the US, France, Sweden, and Hungary, Comrod's vehicle antenna and other solutions are relied upon by armed forces for tactical communications on the move.

CRFS provides actionable RF intelligence in contested electromagnetic environments to help military forces gain spectrum dominance. CRFS is proud to support the Royal Signals Institution - championing innovation, expertise, and the future of military communications.

Company X Consulting Ltd is currently ranked #7 in the Top 50 Employers of Veterans. The company is also the highest-ranked SME in the UK for 2025, as awarded by the British Forces in Business Awards. By engaging with RSI, we stay connected with the evolving needs of defence communications and digital transformation, whilst continuing to champion the incredible talent of our ex-military consultants and rewarding the dedication of serving personnel by presenting the Top Student award on the Royal Signals Supervisor courses.

As sophisticated, unpredictable threats continue to grow, it can be critical for governments and organizations to step up their defence. Through our insights, we look at the most strategic ways to help navigate today’s disruptive, geo-political landscape and offer agile solutions that can promote a stronger, more cost-effective defence agenda. Serving many branches of the military, defence agencies, and the intelligence community, as well as justice organisations, we are well-versed in the key pillars of defence.

Dispel is an international specialist in industrial cybersecurity & networking. Itprovides secure remote access and real-time data streaming to OT systems, connecting in under 30 seconds, and standardising access across enterprises.

Domo Tactical Communications (DTC) is leading the way in future surveillance operations within high performance overt and covert video, audio, tracking and cellular solutions.

Frazer Nash Consultancy Ltd is a leading UK systems, engineering and technology company and part of KBR. We work closely with Defence and Security organisations to deliver assured, resilient and operationally relevant solutions across communication information systems and decision support; enabling effective command and control in increasingly complex and contested environments.

For over 60 years, Fujitsu has safeguarded the UK's most critical infrastructure, ensuring 24/7 operations that keep the nation functioning. Around 4,000 security-cleared UK employees deliver solutions at the highest levels of security to meet the nation's demanding security needs. Unlocking the future of defence, Fujitsu stands with the Royal Signals on a shared mission to innovate military IT, cyber, and communications, powering their mission with our secure, next-generation solutions.

General Dynamics UK is one of the nation’s leading defence companies and a key supplier to the UK Ministry of Defence. For more than 70 years, we have delivered trusted avionic, maritime, and land solutions – including the Bowman tactical communication system and AJAX, the future of Armoured Fighting Vehicles for the British Army – as we continue to develop cutting-edge capability that meets the evolving demands of the modern warfighter.

Specialists in satellite, RF, cloud and IP networking solutions we design, integrate and support critical communication systems used globally by defence, government, emergency response, commercial businesses and the oil, gas and mineral exploration industry. Our partnerships and status as a Tier 1 VAR (Value-Added Reseller) with many of the world’s leading satellite hardware and airtime providers, ensure our customers receive cost-effective solutions, intelligently integrated with their existing business and services, backed up by through life support and training.

JET Connectivity designs and builds robust, fast to deploy and easy-to-use private 5G networks on land, at sea, and in the air - extending horizons. The company is currently building a portfolio of experience across trials and exercises with a variety of customer partners in the services. JET Connectivity is proud to be joining as a corporate member of the RSI. We look forward to extending our connection into this important community of professionals as it starts exploring the opportunities that 5G provides as a communications tool of the future.

L3Harris Technologies is the Trusted Disruptor in the defense industry. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security. We have partnered with the UK MOD over may years to provide C4 capabilities to front line users. Supporting the RSI is a key element in this partnership, providing a forum to discuss requirements, solutions and advances in technology with serving and industry CIS professionals.

Leidos is an information technology and engineering company, delivering multi-platform capable C5IS, pan domain. We are proud to support the Royal Signals Institute in our shared values to foster strong professional relationships that could shape the future of IT, information services, cyber, telecoms, and data capability.

Leonardo is a global security company that realises multi-domain technological capabilities in Aerospace, Defence, and Security. In the UK, Leonardo is one of the biggest suppliers of defence and security equipment to the UK MOD and operates from 9 main sites across the UK employing over 8,500 highly skilled people, from Edinburgh to Yeovil.

Founded in 1980, Marlborough Communications Limited (MCL) has spent over four decades supporting the UK's defence capability through the delivery of C4ISR solutions to military and government customers. As a trusted UK partner to the MOD, MCL specialises in delivering mission-critical solutions across EW systems, tactical communications, uncrewed systems (UAS and robotics), hyperspectral imaging, counter-UAS capabilities, and custom engineering projects tailored to operational requirements. Our in-house engineering capabilities span mechanical design, integration, and through-life support.

Micropol Fiberoptic is a Swedish company and market leader in rugged fiber optic solutions for defense, security, and harsh environments. They offer high-performanceExpanded Beam technology connectorstactical cable assemblies, and network monitoring systems (CAMO). Their products, designed for superior data integrity and reliability, are used globally by armed forces.

With over 30 years of expertise, Network Innovations is a leading provider of fixed and mobile satellite communications and large-scale network systems integration, delivering mission-ready connectivity across all operational domains. Through an end-to-end portfolio of capabilities, products and services, the company supports complex operational challenges in the most demanding environments.

Nexor delivers secure and scalable information exchange solutions for Defence, Law Enforcement, Government Security Services, and high assurance niches within CNI. We solve complex operational and technical challenges at pace, integrating best-in-class technologies to protect sensitive data across domains, while ensuring operational efficiency, cost-effectiveness, and mission success.

Nokia is a trusted leader in end-to-end communications solutions adapted to support the mission-critical needs of today’s armed forces. Nokia’s easy-to-deploy, advanced connectivity solutions are designed to solve the most complex tactical networking challenges and support large-scale deployment of digital services for the battlefield.

NSSLGlobal has been delivering critical satellite communications, project engineering and technology to the UK MOD since 1982 and now provides services to every Royal Navy platform, the commando force, several Army and RAF units, specialist aircraft and joint deployments. The company also provides communications to wider government organisations including embassies, several NATO nations, and to many sizeable commercial maritime customers.

Pera Prometheus are experts in advising the Defence Industry on safeguarding both their own and MOD information. Our veteran information and cybersecurity consultants understand MOD requirements, as we have seen the challenges from both the Defence and Commercial side.

Pexip is a video technology company. Our platform powers defence organisations to collaborate and enables people to communicate everywhere, at all classification levels. Our unique technology offers ultra-secure on-prem, air gapped deployment and optimised experiences in the tactical space in constrained network conditions. We partner with technology experts to create innovation in defence, such as advanced policy-based access controls and collaborative working environments for aerospace.

Plextek is a UK engineering consultancy with 35+ years' expertise in RF, radar, communications, and EW systems. We deliver novel concepts to deployable capability through agile research and development, specialising in low SWaP, cost-effective technologies designed to scale at pace for defence and security applications.

Prolinx are industry leading experts at delivering Secure by Design cloud solutions for the Defence and National Security sectors and their industry partners where seamless connectivity and secure collaboration is vital to enabling secure data driven success. Our digital solutions protect your data within our UK-based secure data centres, supported by a 24/7 SOC and NOC and deliver assured UK-sovereign hybrid cloud providing resilience, choice and agility while enabling secure operations in support of mission and operational objectives.

Radiocoms Systems Ltd is a leading provider of defence and security solutions. We understand that digital transformation is crucial for maintaining a world-class military force. In partnership with Defence Digital, Radiocoms, a trusted Tier 1 contractor, supports the MoD in addressing its challenges of today, tomorrow, and the future.

Roke are defence, security & industry specialists - helping solve challenges that shape lives, safeguard systems & strengthen future capabilities.

Rowden is a UK-headquartered engineering company delivering sensing, networking, and edge compute capability for defence, national security, emergency services and critical infrastructure. Founded in 2017 and now one of the fastest growing technology companies in the UK, Rowden delivers complex systems that enable data sharing, coordination and decision-making in constrained environments. Headquartered in Bristol, with over 20,000 sq ft of engineering facilities, Rowden is building sovereign industrial capability with global reach, combining rapid assimilation of commercial technology with deep manufacturing and engineering expertise.

SAS is a global leader in data and AI, supporting organisations to turn complex data into trusted, actionable insight at speed. For nearly five decades, SAS software has supported trusted, mission critical decisions across government and industry.

Sirius Analysis Limited is an independent consultancy providing multidisciplinary technical expertise and innovative solutions to complex projects across defence, space, nuclear, energy, and sustainability. We’re proud to support the development of inspirational, skilled professionals who operate at the cutting edge of defence and communications.

SiXworks, an IBM company, is a leading provider of secure digital solutions, specialising in digital experimentation and focused on fail-safe-fast cutting-edge technology solutions deployed in highly secure environments. We are unified in our mission to accelerate innovation and adoption of secure, digital technology to improve the operational agility of Defence and National Security.

Sopra Steria, a European Tech leader recognised for its consulting, digital and business process outsourcing services, helps its clients drive their digital transformation. Sopra Steria has been working with the UK Ministry of Defence for over 30 years supporting secure collaboration, logistics, personnel and the defence supply chain. With over 50,000 employees, Sopra Steria places people at the heart of everything it does to build a positive future.

Spectra Group is a UK-based defence communications specialist founded in 2002, with over 20 years’ experience delivering secure, beyond line-of-sight voice and data communications to government and military users worldwide. Founded by former members of the Royal Signals Regiment, and continuing to employ many ex-Signallers, Spectra designs and delivers advanced tactical communications systems including GENSS and the Troposcatter Family of Systems.

Symposium IT is a Manchester-based technology consultancy specialising in cloud, security, managed IT services, and fully accredited technical training. Founded by a former member of the Royal Corps of Signals, the business brings a disciplined, security-first approach to designing, delivering, and operating scalable technology platforms and training programmes for organisations across the public and private sectors, with a strong focus on quality, governance, and long-term partnerships.

Systematic Software is the supplier of the world’s leading C4ISR solution, SitaWare, integrating military forces across domains, alliances and coalitions, and levels of command. SitaWare is in use by NATO, with an additional user base of 50+ countries worldwide. Headquartered in Aarhus, Denmark, Systematic’s presence extends to 13 offices across Australia, Canada, Finland, Germany, New Zealand, Romania, Sweden, the United Arab Emirates, the UK, and the US.

Team Forces is a small charity dedicated to enhancing the lives of the Armed Forces community through sport, challenge, and adventure. Our mission is to provide sustainable funding for more than 100 sports associations and groups across the Armed Forces. Through our initiatives, we strengthen health, wellbeing, and recovery by promoting excellence, equality, and inclusion — helping the best become even better.

Techmodal is a Bristol-based data consultancy that empowers UK Defence and the public sector to do more with what they have - transforming data into actionable insights that drive meaningful outcomes. As specialists in turning data into meaningful insight, we share their commitment to innovation, knowledge-sharing, and supporting those who serve.

Thales is a global technology leader in the Defence & Security, Aeronautics & Space, and Cybersecurity & Digital identity domains. With its 30,000 engineers and researchers, Thales has a unique capability to design, develop and deploy equipment, systems and services that meet the most complex security requirements. Thales has an exceptional international footprint, working with customers and local partners around the world

Founded in 2015, TIA Group is a UK sovereign engineering business focussed on the development of specialist electronic systems for the Defence & Government markets. From our combined engineering and production facility in Cheltenham, we offer a range of product development and consultancy services. Our experienced team of engineers and production operatives has a proven track record of delivering on-time to the UK MOD, Government and NATO. We also work closely with the UK Primes & other SME’s, offering our design & development services to create solutions and build hardware.

Ultra Cyber Ltd is UK specialist link encryption company that designs, develops and manufactures robust and resilient High Grade and High Assurance, secure communication solutions for the MOD, 5 EYES and NATO Partners/Allies. We support the RSI to nurture and protect current and future, sovereign strategic communication capabilities.

Viasat is a global communications company that provides mission critical services across all domains, connecting those on the field, platforms, sensors and effectors anywhere. Relied upon by 90 governments around the globe as a recognised partner of those who protect, International Government is also proud to support and sponsor the RSI in its mission to promote debate, research and innovation.