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Engineer in the Radio Frequency group

Job Details

The European Synchrotron, the ESRF, is an international research centre based in Grenoble, France.

Through its innovative engineering, pioneering scientific vision and a strong commitment from its 700 staff members, the ESRF is recognised as one of the top research facilities worldwide. Its particle accelerator produces intense X-ray beams that are used by thousands of scientists each year for experiments in diverse fields such as biology, medicine, environmental sciences, cultural heritage, materials science, and physics.

Supported by 21 countries, the ESRF is an equal opportunity employer and encourages diversity.

The Accelerator and Source Division (ASD) operates an accelerator complex with a 6 GeV electron storage ring, which is the source of the X-rays that are exploited on the experimental stations. In 2020, the ESRF has commissioned a new ultra-low emittance ring that constitutes the world’s first Extremely Brilliant Source (EBS) of hard X-rays. As part of the ASD, the Radio Frequency (RF) group is responsible for the 200 MeV Pre-Injector Linac, the 352 MHz accelerating RF cavities of the booster and the storage ring with their high power RF transmitters, as well as the pulsed magnets and power supplies of the beam injection/extraction systems. The RF group comprises five units with a total of 16 collaborators.

As an engineer in the RF group, within the RF power amplifiers unit, your main tasks will be to :

  • Participate in the operation, maintenance, monitoring and upgrading of RF power amplifiers to ensure safe and reliable operation of the accelerator complex;
  • Taking an active part in current projects: replacement of the 1.1 MW klystron transmitters with ten 110 kW solid-state amplifiers, implementation of 1.4 GHz solid-state amplifiers for the new 4th harmonic RF system for cluster extension;
  • RF characterization and tuning of passive components using a vector network analyzer;
  • RF design, prototyping, characterization and optimization of active RF components, in particular RF amplifier boards;
  • Actively participate in technical and scientific exchanges and collaborations at a global level within the accelerator community.

In addition, as a member of the Accelerator and Source division, you will be required to contribute 15% of your time to the operation of the accelerator complex as part of the shift work for the user service and take part in the RF standby duty.

  • Higher university degree in Electrical or Electronics Engineering with a specialization in Radio Frequency and/or Microwave technology, Master of equivalent (300 ECTS diploma);
  • Minimum 5 years’ professional experience in high power RF engineering;
  • Master microwave concepts like S-parameters, waveguides and their modes, resonators and their modes, circulators, gain, efficiency, coupling, directivity, frequency/time domain;
  • Ability to carry out measurements, diagnostics and calibrations on complex low and high power RF equipment, using vector network analyzers, RF power meters, spectrum analyzers;
  • Ability to draw up technical specifications, scientific reports and make oral presentations in English (working language at the ESRF);
  • Sound teamwork capability.

Permanent position. Participation in shift work according to the ESRF regulations.

The salary will be calculated on the basis of relevant qualifications and professional experience.

Do you recognize yourself in this description? Apply now for your next professional adventure!

What we offer:

  • Join an innovative international research institute, with a workforce from 38 different countries;
  • Collaborate with global experts to advance science and address societal challenges;
  • Come and live in a vibrant city, in the heart of the Alps, and Europe’s Green Capital 2022;
  • Enjoy a workplace designed to support your quality of life;
  • Benefit from our competitive compensation and allowances package, including financial support for your relocation to Grenoble For further information on employment terms and conditions, please refer to

The ESRF is an equal opportunity employer and encourages applications from disabled persons.


ESRF imageThe ESRF is a landmark for fundamental and innovation-driven research, providing scientists from all over the world with the most brilliant X-rays to unveil the structure of materials and the mechanisms of life, down to atomic resolution. Our teams contribute to addressing the complex global challenges that our society faces.

Why work for us
For more than 30 years, the ESRF has enabled major scientific breakthroughs in the understanding of living and condensed matter. With its new Extremely Brilliant Source (EBS), the ESRF is opening new vistas for X-ray science, providing a growing community of scientists with unique facilities to tackle the complex global challenges facing our society. Scientific and technical interdisciplinarity are at the core of the ESRF’s success.

Training and development
The ESRF provides a unique and vibrant setting for early-career scientists, engineers and technical staff to train and develop their scientifc and technical abilities, thus driving the transfer of expertise to other research projects, to industry and to society at large. At the ESRF, we dedicate a significant part of our yearly budget to training our staff. Our human resources policy encourages internal mobility and many of our staff members have the opportunity to change jobs during their career.

Graduate schemes
The ESRF supports many initiatives and public events aimed at sharing knowledge of science and engaging with a diverse range of audiences, including school students and young children. At the heart of this mission, the ESRF offers different educational programmes for students of all levels.

Each year, the HERCULES European school, the Joint Universities Accelerator School, and the joint International Summer Student programme that we run with the Institut Laue-Langevin, offer introductory lectures and specialized courses, practical sessions, tutorials and visits to other European research facilities.

What we are looking for
We are looking for passionate and curious people who are eager to collaborate in an eminently international open environment.

We welcome people who wish to contribute to a better understanding of the world around us and to inspire and drive progress.

We welcome people in many different disciplines (e.g. science, engineering, management) who contributes, through their diversity (gender, nationality, language, culture) and their professional skills to push the frontiers of science.

Grenoble, France

Number of employees

Main areas of research
The ESRF has defined seven EBS Science goals, in line with UNESCO’s objectives for sustainable development and with the global challenges identifed by the EU’s Horizon Europe research and innovation programme:

  • Health innovation, overcoming diseases and pandemics
  • Materials for tomorrow’s innovative and sustainable industry
  • Clean energy transition, sustainable energy storage and clean hydrogen technologies
  • Planetary research and geoscience
  • Environmental and climatic challenges
  • Bio-based economy and food security
  • Humanity and world cultural heritage

Positions recently recruited for
Scientists, postdocs, PhD students, engineers, technicians, administration, management

Desired degree disciplines/class
From apprenticeship to PhD, in various disciplines (e.g. science, engineering, management, administration)

How to apply
Apply online at For further information contact

Closing date
All year round

Tel +33 04 76 88 20 19

Company info
71 avenue des Martyrs
CS 40220
Cedex 9

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