Power Electronics Engineer

TE Magnetics is the high temperature superconducing (HTS) technology division of Tokamak Energy. Born from our mission to deliver fusion energy, we have developed world‑leading HTS technology, protected by more than 250 patents and supported by exceptional scientific, engineering, and commercial expertise.

HTS is a transformative technology for a wide range of industries, enabling magnet and power distribution systems that are more powerful, lighter, compact, and highly efficient—transforming industries, creating new opportunities, and accelerating innovation.

TE Magnetics, which is already generating multi‑million‑pound revenues, is developing robust, high‑quality HTS solutions across fast‑growing markets including fusion, power systems, analytical science, propulsion, and defence. We are the Magnet Systems Partner for the UK Government's STEP Fusion programme, under a £70 million contract running to 2029, working with UK Fusion Energy to deliver HTS magnet systems for the STEP prototype power plant, while also contributing to tokamak systems and plasma integration.

Founded in 2009 as a spin‑out from the UK Atomic Energy Authority, Tokamak Energy is headquartered in Oxfordshire, with subsidiaries in the United States and Japan. Today, we employ over 300 people and have secured more than £280 million in investment.

At Tokamak Energy, we are pioneering the future of clean energy through high‑temperature superconducting (HTS) technology. Our TE Magnetics division is rewriting the rules of power system design—moving beyond traditional high‑voltage paradigms to ultra‑high‑current, low‑voltage architectures. This is your opportunity to work on genuinely first‑of‑a‑kind systems and help bring them from concept to reality.

We are looking for a Senior Power Electronics Engineer to take ownership of power conversion systems within cutting‑edge programmes such as Super

DC. This is a hands‑on engineering role where you will design, build, test, and iterate novel power electronics solutions, turning experimental concepts into real, deployable systems.

• Designing power electronics systems (including DC‑DC converters, PSUs, and multi‑stage architectures)
• Owning a subsystem end‑to‑end, from concept through to demonstrator
• Developing and running high‑power test programmes
• Working closely with multidisciplinary teams (HTS, systems, control, mechanical)
• Applying first‑principles thinking to solve complex engineering problems
• Translating experimental learnings into robust, product‑ready solutions

• Strong experience in power electronics design, development, and testing
• Background in power conversion (DC‑DC, converters, control systems)
• Ability to work independently and own technical problems end‑to‑end
• Experience in industrial, high‑power, or complex engineering environments
• Strong communication skills and the ability to collaborate across teams

• Hybrid working model: minimum 60 % onsite / 40 % home working split. Part‑time working or job share options will be reviewed on an individual basis.
• 25 days holiday (plus bank holidays and discretionary 3 festive days to be used between Christmas and the New Year)
• Company pension scheme
• Eligible for company share option scheme
• Company bonus scheme, discretionary, dependent on performance
• A range of financial benefits including death in service and critical illness cover
• Cycle to work scheme

No terminology in the advert or job description is intended to discriminate on the grounds of a person’s age, disability, gender reassignment, marriage or civil partnership, pregnancy or maternity, race, religion or belief, sex, or sexual orientation. Every candidate will be assessed only in accordance with their merits, qualifications and abilities to perform the duties of the job.

Please note that the appointment of the successful candidate will be subject to standard pre‑employment screening, as applicable to the post. This will include right‑to‑work, proof of identity and references.

Please note that any personal data submitted to Tokamak Energy as part of the job application process will be processed in accordance with the GDPR and related UK data protection legislation, for more information regarding GDPR please see:

Entry into employment with the Tokamak Energy and progression within employment will be determined only by personal merit and the application of criteria which are related to the duties of each post and the relevant salary structure. In all cases, ability to perform the job will be the primary consideration. No applicant or member of staff shall be discriminated against because of age, disability, gender reassignment, marriage or civil partnership, pregnancy or maternity, race, religion or belief, sex, or sexual orientation.