Company

Engineers whofinish things.

Halvard was founded in Cardiff in 2019 by four engineers from the national fusion lab who thought the physics was done and the engineering was late.

Founded2019

People140

Sites3

Raised£1.1 bn

How we work

Four rules wehire against.

Build the next one

Every design decision is judged by whether the tenth plant is cheaper than the first.

Dates are promises

We publish our milestones and report against them every quarter, including the ones we miss.

Show the data

Shot data goes to the national programme and to peer review. We do not announce what we cannot show.

Hire the builders

Half our engineers came from shipyards, grid companies and oil platforms, not physics labs.

The team

140 people who havebuilt hard things before.

We are hiring · 23 roles

Dr Maren Holt

Co-founder, CEO

Ran the high-field magnet programme at the national lab for nine years.

Idris Kaan

Co-founder, CTO

Designed the H-0 test machine. Holds the shot record.

Dr Ines Arrieta

Chief Scientist

Plasma physicist. 60 papers on edge stability.

Tom Achebe

VP Construction

Built two combined-cycle plants and a subsea interconnector.

Dr Lena Voss

Head of Blanket and Fuel

Molten-salt chemist, formerly in fission fuel cycles.

Rafael Ondo

Head of Operations

Twenty years in grid control rooms.

Priya Ramanathan

CFO

Financed 3 GW of offshore wind.

Joel Brennan

Head of Safety and Licensing

Former regulator. Wrote the fusion safety guidance.

Milestones

Fifteen years froma drawing to the grid.

Hottest plasma so far

—

2019

Founded in Cardiff

Four engineers from the national lab spin out with a design for a compact, high-field tokamak.

2021

First HTS magnet

A 20-tonne superconducting coil holds 12 tesla for 100 hours straight.

2023

Test machine H-0

First plasma in our half-scale device, 11 million °C for 0.3 seconds.

2025

Record shot

H-0 holds 94 million °C for 8 seconds, a record for a machine its size.

2026

Site consent

Planning consent for Halvard One on the former Aberthaw coal site.

2029

Hall complete

The tokamak hall and turbine refurbishment finish. Coils arrive by sea.

2032

First plasma, H-1

Halvard One lights for the first time.

2034

Power to the grid

400 MW, sold to four offtakers under 20-year contracts.

Backed by

Northgate CapitalSevern Infrastructure FundAurel PartnersKestrel VenturesTidewater Pension TrustMarlowe & FinchOxbridge InnovationHarbour PointNorthgate CapitalSevern Infrastructure FundAurel PartnersKestrel VenturesTidewater Pension TrustMarlowe & FinchOxbridge InnovationHarbour Point

Where we are

Three sites,one machine.

51.46° N, 3.16° W

Cardiff

Headquarters and simulator

Tŷ Halvard, Bute Place, Cardiff CF10 5AL

51.66° N, 1.23° W

Culham

Magnet and test hall

Unit 4, Culham Science Park, OX14 3DB

51.39° N, 3.40° W

Aberthaw

Halvard One site

Former power station, Fonmon Road, Barry CF62 4ZW

Careers

Come andbuild it.

23 open roles across magnets, physics, construction and operations. Most do not need a physics degree.

Talk to our team See the plant→