PA Consulting and Cosine collaborate to advance sovereign AI for critical sectors
PA Consulting (PA), a Jacobs company, is joining a coalition led by London-based Artificial Intelligence (AI) lab Cosine to co-design Lumen Sovereign, the U.K.’s first fully sovereign frontier AI model for highly regulated and nationally important sectors.
The collaboration brings together PA, Cosine and other industry leaders to help shape the U.K.'s sovereign AI capability. One of the first priorities is developing a nuclear-trained large language model for the U.K.'s civil and defense nuclear sectors, designed to help organizations address important challenges including skills and capability gaps, retaining critical expertise, and making decades of nuclear knowledge more accessible.
The coalition aims to support the adoption of sovereign AI applications across other highly regulated sectors, including government, defense, financial services, healthcare and critical national infrastructure.
This strategic initiative aligns with the U.K. government’s growing focus on sovereign AI as artificial intelligence becomes increasingly important to national security, economic resilience and critical infrastructure. U.K. government initiatives, including the Sovereign AI program and new AI Hardware Plan, are intended to strengthen domestic AI capability and resilience and expand national compute capability.
PA Consulting, Global Head of AI, Alwin Magimay said: “AI sovereignty is becoming increasingly important for organizations operating in critical national infrastructure. The UK has an opportunity to lead in applying trusted, secure and practical AI to some of its most complex national challenges. By working with Cosine, we want to make sovereign AI a practical capability for critical sectors – starting with applications that build on PA’s work with Sellafield and Nuclear Decommissioning Authority.”
Cosine, CEO, Alistair Pullen said: “The case for a nuclear-specific large language model is strong. Civil nuclear organizations need AI systems that understand the language of the sector, can support highly specialized workflows and can be deployed in ways that align with operational and governance requirements. PA Consulting brings exactly the kind of sector insight needed to build something genuinely useful for the industry. Together, we want to explore how a focused, high-performance Large Language Model (LLM) can support civil nuclear organizations with practical applications across knowledge management, engineering support and operational delivery.”
The collaboration builds on PA’s work helping organizations apply AI responsibly and effectively in complex, regulated environments, while supporting the growth of the U.K.’s AI ecosystem of talent and innovative new British tech companies. PA combines deep sector expertise with data, digital and AI capabilities to help organizations move from experimentation to operational deployment.
This builds on PA and Jacobs’ work with Sellafield and Nuclear Decommissioning Authority to pioneer DANI, the nuclear decommissioning industry’s first AI assistant. DANI demonstrates how AI can help nuclear organizations manage complex knowledge, support safety-critical activities and provide engineers faster access to critical information.
Carl Dalby, Group Head of AI and Digital, Nuclear Decommissioning Authority said: “The nuclear sector holds decades of specialist information, embedded in very experienced people, technical records, and complex systems. Sovereign AI offers a significant opportunity to preserve this information, make it easier to access and support better decisions across the nuclear enterprise. Working together, this initiative represents an important step in developing secure, trusted AI designed around the needs, standards, and responsibilities of the U.K. nuclear sector.”
About PA Consulting
PA Consulting believes in the power of ingenuity to build a positive human future.
As strategies, technologies and innovation collide, we create opportunity from complexity.
Our diverse teams combine deep expertise, innovative thinking and breakthrough technologies to help clients adapt, transform and achieve enduring results across consumer and manufacturing, defense and security, energy and utilities, financial services, government and public services, health and life sciences, and transport.
As a Jacobs company, we combine strategic advisory, design and delivery as a single partner across the full program lifecycle. Together, our global team of approximately 47,000 help clients shape investment decisions, solve complex challenges and deliver lasting outcomes.
Discover more at paconsulting.com and connect with PA on LinkedIn and X.
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About Cosine
Cosine is the British sovereign AI lab building frontier models for defense, national security, and highly regulated industries. Our Lumen model family is designed for software engineering and other high-value tool-using work in fully air-gapped, high-security environments.
Powered by our in-house ML research lab and backed by the UK Government’s Sovereign AI initiative, we are building the UK’s first fully sovereign frontier AI model. While we also post-train strong open-weight models on proprietary human-reasoning and domain-specific data, our flagship sovereign model is being developed with zero dependence on foreign infrastructure. This gives customers frontier capability with stronger control over training, deployment, and long-context performance.
Deployable entirely within a customer’s VPC or fully on-premise with zero data egress, Cosine gives governments, enterprises, and critical infrastructure providers sovereign control over the models, infrastructure, and data behind their AI systems.
