About 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”
Meet our executive team
Dr Thomas Davis
Co-founder &
Chief Executive Officer
Thomas leads the executive branch. He has a background in materials science, fusion engineering, and nuclear regulation, and holds a PhD (DPhil) in Materials Science from the University of Oxford.
James Dimitriou
CHAIRMAN
James is a seasoned entrepreneur with a background in corporate finance, investments and acceleration of novel innovation. He leads the company’s corporate governance and investments. He holds an MSc in Finance from the University of Surrey.
Jonathan Musgrove
Co-founder &
Chief Operating Officer
Jonathan runs the company operations. He has a background in chemical engineering and regulatory compliance. He holds an M.Eng in Chemical Engineering from the University of Birmingham, UK.
Dr Alasdair Morrison
Chief Technology Officer
Alasdair leads the company’s research team on fusion energy systems. He has a background in materials science, manufacturing and fusion technology, and holds a PhD (DPhil) in Materials Science from the University of Oxford.
Our team
Oxford Sigma have collected over 100 years of experience in fusion and closely related extreme environments. Across our domain expertise, we cover the fusion materials, processing, application, testing and simulation spaces.
> 100 years
Experience in fusion and related fields
> 43%
PhDs in materials and nuclear systems
> 90%
STEM educated
> 25%
Chartered engineers, with > 60% working toward chartership
Partnerships &
Collaborations
Partnerships and collaborations are at the core of our ethos. Fusion and other extreme environment challenges are unlikely to be solved in isolation.
See our latest updates on our progression for more details on our current partnerships. Contact us if you would like to partner to solve a challenge with materials.
