Oxford Sigma
Our History
Oxford Sigma is an internationally recognised advanced materials company focused on fusion, nuclear, and defence systems. Founded in 2019, we were established to support the commercial deployment of fusion energy by addressing the critical challenge of developing sustainable, high-performance materials for extreme environments.
Our Belief
We believe that the future of fusion energy, nuclear fission, and high-energy systems depends on materials that can withstand the harshest environments. By designing and validating these materials, we enable technologies that support energy security, national resilience, and climate action—always grounded in scientific integrity and engineering excellence.
Our Vision
Our vision is to accelerate the deployment of energy and defence systems that strengthen energy security and national resilience. We focus on enabling commercialisation through leadership in international standardisation, the development of advanced materials for extreme radiation and temperature conditions, and strategic innovation in materials engineering.
Our Approach
We pursue practical yet ambitious targets in materials selection and development for extreme environments—across fusion energy, advanced nuclear, and high-impact defence systems. Our approach is technology-agnostic and grounded in scientific rigor, engineering integrity, and pragmatic design. This enables us and our partners to make sound design choices, deliver advanced materials systems, and accelerate the de-risking of technology deployment.
We deliver practical, high-performance materials solutions grounded in reality: “Right Material, Right Place”
Our Capabilities
Oxford Sigma delivers advanced materials and engineering solutions for fusion, nuclear, and defence systems in extreme environments.
We specialise in:
Materials Manufacturing: End to end production of lithium ceramics for tritium breeding, liquid metal materials, high performance ceramics, and radiation shielding solutions.
Tritium & Lithium Systems: Materials and technologies supporting tritium extraction, control, and breeder blanket performance, along with safe lithium based systems.
Fusion Engineering Services: Expertise and in depth experience in materials selection, liquid metal systems, qualification, construction codes, regulatory compliance, and nuclear and thermal engineering for next generation fusion designs.
These capabilities support our mission to deliver robust, scientifically grounded material solutions that accelerate safe and commercially viable energy and defence technologies.
