Power Electronics Engineer​/Senior Power Supply Technician

Harwell, Oxfordshire – based onsite.3-year fixed-term appointment

Diamond Light Source is the UK’s national synchrotron; a huge scientific facility designed to produce very intense beams of X-rays, infrared and ultraviolet light. Our scientists use the light to study a vast range of subject matter, from new medicines and treatments for disease to innovative engineering and cutting‑edge technology.

At Diamond we are currently undertaking a major upgrade of the facility, known as Diamond-II. Diamond-II will combine a new machine and new beamlines with a comprehensive series of upgrades to optics, detectors, sample environments, sample delivery capabilities and computing, which will ultimately generate an even more brilliant light source at a higher energy.

We now have an opportunity for a Power Electronics Engineer / Senior Power Supplies Technician to join the Power Supplies Group on a 3-year fixed-term appointment. This role will support both the Diamond‑II upgrade and the reliable operation of Diamond’s existing accelerator power converters, with a strong focus on supporting delivery of new high‑performance magnet power supplies and associated equipment. The work will include testing, installation and commissioning of new and existing power supply systems, alongside hands‑on fault finding, repair, integration, documentation, procurement support and operational response.

Key responsibilities will include:

• Supporting the safe and reliable operation of Diamond’s existing accelerator power converter systems, including routine checks, troubleshooting, fault investigation, repair and return‑to‑service activities.
• Testing, installing, commissioning and handing over new and existing power supply systems, including circuit boards, controller interfaces, interlocks, cabling, backplanes, racks and complete power supply assemblies.
• Supporting Diamond‑II delivery through equipment build, integration testing, acceptance testing, installation preparation, commissioning and operational readiness activities.
• Diagnosing and repairing faults on power electronic assemblies, modules and systems, including component‑level investigation where required, and contributing to improvements that reduce recurrence and improve availability.
• Preparing and maintaining test equipment, fixtures, wiring looms, operational spares, procedures, test records, drawings and technical documentation needed for maintenance, shutdowns, installations and commissioning.
• Supporting procurement, supplier liaison, acceptance of delivered equipment and quality assurance activities for parts, assemblies and services.
• Participating in the group’s operational support arrangements, including the on‑call and occasional shift or out‑of‑hours work to support machine operation, shutdowns, installations, commissioning and recovery activities.

You will have a relevant engineering qualification, or equivalent practical experience, gained in an electrical, electronic, power electronics, installation, commissioning or operational support environment.

You should have practical experience of working with power supplies, power converters, electronic assemblies or similar electrical/electronic systems, and be confident interpreting engineering drawings, wiring diagrams and schematics.

You should also have hands‑on experience in areas such as rack build, cabling, wiring, integration testing, electrical installation, equipment handover, maintenance or commissioning.

You will be comfortable carrying out laboratory, workshop and site‑based testing, fault finding, repair, installation and commissioning activities, using equipment such as oscilloscopes, power analysers, signal generators and similar instrumentation.

Experience in one or…