PhD Position in Gravitational Waves

We are expanding our team working on the Einstein Telescope and the Virgo detector, and invite applications for one PhD position in the framework of optical sensing and modeling.

The PhD position will focus on the development and application of the modelling framework Finesse (https://finesse.ifosim.org/). Finesse is an open source code for modelling laser interferometers for precision experiments and we deliver the software to the large scientific projects Virgo, LIGO and the Einstein Telescope (ET). To keep up with the more advanced instrumentation in ET we are extending and enhancing Finesse. You will make significant contribution to the Python code and you will work as a member of the international design team that defines the shape and performance of the most advanced observatory for gravitational waves.

The group:
The Gravitational Wave group consists of about 20 staff scientists, 20 postdoctoral researchers, and 30 PhD candidates. The group is engaged in gravitational-wave observational science through active participation in the VIRGO and LIGO interferometer collaborations, and in instrumentation R&D with a particular emphasis on components for the VIRGO detector, such as advanced seismic isolation and suspension systems, advanced optical sensors (phase cameras and quadrant photodiodes). The group is leading the development of Finesse, a tool widely used to design and model gravitational wave detectors. In this context it is deeply engaged in the efforts of implementing a complete model of the Virgo interferometer and of designing the future Einstein Telescope.

Nikhef has established ETpathfinder, a dedicated R&D infrastructure located in Maastricht, aimed at developing and testing key technologies to enable the low-frequency sensitivity of third-generation detectors like the Einstein Telescope (ET).

The group also plays a central role in the preparatory efforts for the Einstein Telescope. The Netherlands, in collaboration with Belgium and Germany, is coordinating a transnational initiative to propose the EMR (Euregio Meuse-Rhine) region as a candidate site for the ET.

Offer
The successful candidate will be employed by the NWO-I foundation for a period of 4 years. The candidate will be embedded in the Nikhef Gravitational Wave group and stationed in Amsterdam, collaborating closely with colleagues in Maastricht. The salary is competitive, and the conditions of employment (https://www.nwo-i.nl/en/employees/) are excellent.

Requirements:
– A Master’s degree in physics, optics, computer science, or a closely related field.
– An interest in computational modeling.
– Good knowledge of the Python programming language, the knowledge of C or Cython will be considered an asset.
– Working knowledge of the Linux, Windows (and Mac) operating system.
– The ability to collaborate and communicate well in English.

Application and Further information:
Qualified applicants are encouraged to apply by filling the application form below. Please be prepared to upload a curriculum vitae and a motivation letter, and have the email addresses of at least one referent ready, who is willing to send a letter of recommendation on your behalf. The deadline for the application is September 15th, 2025. Anyway, the positions will be filled as soon as possible. For further information feel free to contact either Andreas Freise (a.freise@nikhef.nl) or Anna Green (agreen@nikhef.nl).

Nikhef is committed to being an inclusive and diverse organisation. Applications from women and people belonging to minority and underrepresented groups are especially welcomed.