Job Offers

Engineer or Physicist (all genders) for accelerator maintenance and operation

GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt operates one of the leading particle accelerators for science. In the next few years, the new FAIR (Facility for Antiproton and Ion Research) one of the world's largest research projects, will be built in international cooperation. GSI and FAIR offer the opportunity to work together in this international environment with a team of employees committed to ensuring each day to conduct world-class science.


In the business area of Accelerator Operations – department Decelerators (DEC) we are looking for an

Engineer or Physicist (all genders)

for accelerator maintenance and operation

Reference No. 21.102-6450

The division Accelerator Operations is in charge of planning, operation and maintenance of the GSI accelerator chain, ranging from ion sources, linear accelerators, to synchrotron storage rings. As one of its subunits, the department Decelerators supervises and operates the HITRAP linear decelerator and the CRYRING@ESR ion storage ring. These two facilities operate at the low end of ion energies available at GSI, serve a wide range of experiments and thus offer unique design and operation challenges.


Your Tasks

  • Support for the ongoing development and operation of the HITRAP linear decelerator, and its subsystems, the Penning trap and the ion beamline.
  • Leading role in the further development and long-term upkeep of the HITRAP local control and data acquisition system.  Coordination of the transition to the FAIR control system.
  • Implementation of ion beam detectors, ion optical elements, frontend device controllers, vacuum pumps, interlocks and alike. Maintenance and upgrades of ageing equipment.
  • Coordination with various other departments concerning controls, vacuum and diagnostic systems. Market research and updates of the control system hardware and software.
  • Technical documentation of the conducted work and of the overall system.
  • Measurement, data processing and presentation of results in the course of commissioning.
  • Support of other activities of the Decelerators department. Participation in beamtime shifts and/or on-call service.
  • Communication with external collaborators and manufacturers including limited travel.


Your Profile

  • Completed university education (Diploma, M.Sc. or PhD) in engineering or natural sciences with strong computer science background or comparable qualification.
  • Experience with hands-on installation and operation of scientific equipment, ideally with accelerator and ion trapping background. At least elementary electronics knowledge.
  • Very good software and programming skills, especially LabVIEW, C++ and Python. Knowledge of other programming languages, analytical mathematics programs, or scientific software/simulation packages is an advantage. Experience with MS Windows and Linux systems.
  • Experience or willingness to learn industrial communication standards, such as ZeroMQ, Profibus, MQTT, as well as integration of device controllers, interlocks, and similar.
  • Very good English language skills at least at the level of B2. At least basic knowledge of German and a strong effort to improve it.

In addition, this multidisciplinary position implies a high degree of technical and organizational interfaces to other specialist groups, requiring good team and communication skills as well as a precise and structured approach to working.


We offer a versatile and interesting position in a dynamic and well-equipped research environment with international experts. We work in a team with a lot of trust, a flat management structure and short decision making processes.


The position is unlimited. Salary is equivalent to that for public employees as specified in the collective agreement for public employees (TVöD Bund).


GSI supports the vocational development of women. Therefore, women are especially encouraged to apply for the position.


Handicapped persons will be preferentially considered when equally qualified.


Further information about GSI and FAIR is available at and


If you find this position interesting and challenging and would like to work in an exceptional, international, strongly technical environment, please send your full application documents, including the desired salary, with information of your earliest possible starting date and the reference number (21.102-6450) by 08.10.2021 at the latest to bewerbung(at) or:


GSI Helmholtzzentrum für Schwerionenforschung GmbH

Abteilung Personal

Planckstrasse 1

64291 Darmstadt



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