Senior Power Electronics Engineer - Advanced Power Conversion (SuperDC) in Abingdon

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 £70million 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’re redefining how power is generated, controlled, and delivered using high-temperature superconducting (HTS) technology. Within our TE Magnetics division, we’re moving beyond traditional high-voltage approaches—developing ultra‑high current, low‑voltage power architectures that are lighter, more efficient, and fundamentally different from anything in today’s power systems.

We’re now hiring a Senior Power Electronics Engineer to play a key role in our SuperDC programme—a first‑of‑a‑kind initiative focused on next‑generation power conversion. This is a hands‑on, technically deep role for someone who wants to own a problem end‑to‑end and turn bold ideas into working hardware.

What you’ll be doing:

• Take ownership of power conversion subsystems from concept through to demonstrator
• Design and develop advanced power electronics systems (DC‑DC converters, multi‑stage architectures, gate drive systems)
• Build and run high‑power experimental test programmes
• Apply first‑principles engineering to solve novel challenges
• Collaborate across HTS, systems, controls, and mechanical engineering teams
• Translate experimental learnings into robust, real‑world solutions

Why this role is different:

• Work on first‑of‑a‑kind systems, not incremental improvements
• Own a critical subsystem, not just a small part of a large team
• Operate in a high‑autonomy environment where engineers drive decisions
• Help shape the future of fusion and next‑generation power systems

Requirements:

• Strong experience in power electronics design, development and testing
• Expertise in power conversion (e.g. converters, PSU design, control, switching technologies)
• Proven ability to work independently and own technical delivery
• Background in industrial or high‑power environments (not purely academic)
• Comfortable operating in a fast‑paced, experimental setting
• Strong communication skills, with the ability to work across disciplines and stakeholders

We’re especially interested in experience across: DC‑DC converters | multi‑stage converters | gate drive systems | high‑power testing | SiC/GaN technologies | converter topologies.

Please note this role does offer hybrid working, our model sets out a 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, dependant on performance

A range of financial benefits including death in service and critical illness cover

Cycle to work scheme

Important information for candidates:

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.

Pre‑employment screening: 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.

Data privacy: 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.

Equality of opportunity: 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.