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Postdoctoral Position in Cosmology at University of Groningen

Applications are invited for a three-year postdoctoral position with Ema Dimastrogiovanni and Daan Meerburg, starting in Fall 2026. The position is part of the NWO-XL funded "Magnetic Universe" Consortium (https://www.nwo.nl/en/news/64-million-euros-for-groundbreaking-fundamental-research-projects) and is based at the Van Swinderen Institute for Particle Physics and Gravity at the University of Groningen.  Application deadline: January 16th 2026.

Candidates with an interest in theoretical cosmology and possible applications to cosmological data are encouraged to apply. The successful candidate will also have the opportunity to collaborate with consortium members, including Matthieu Schaller at Leiden University, Elisa Chisari and Tomislav Prokopec at Utrecht University, as well as other partners within the consortium, on related projects.

Both Ema and Daan are members of the Cosmic Frontier within the VSI. Research in their groups focuses on early universe physics, gravitational waves, primordial non-Gaussianities, Cosmic Microwave Background, 21cm cosmology and AI enhanced data inference. They currently supervise a total of seven PhD students (including two joint appointments) and one postdoctoral researcher. The newly recruited postdoctoral researcher will be encouraged to take a leading role across both groups, fostering and spearheading collaborative research projects.

Application material: CV, cover letter, research statement, publication list, at least 3 reference letters.


Please find here full details.

Postdoctoral Position in Gravitational Wave Physics (m/f/d, E13 TV-L, 100%) in Tübingen

The Theoretical Astrophysics section (TAT) at the University of Tübingen invites applications for one (1)

Postdoctoral Research Position (Wissenschaftlicher Assistent/ Research Assistant)
in Gravitational Wave Physics (m/f/d, E13 TV-L, 100%)

The position is expected to start as early as 1 March 2026 and is initially funded until 30 September 2027, with the possibility of an extension for one additional year, subject to funding availability and performance. The salary will be determined according to the German public service scale (TV-L E13). Application deadline: January 25th, 2026.

The position is expected to start as early as 1 March 2026 and is initially funded until 30 September 2027, with the possibility of an extension for one additional year, subject to funding availability and performance. The salary will be determined according to the German public service scale (TV-L E13). Application deadline: January 25th, 2026.

The research activities of TAT are centered on the study of sources of gravitational waves, with an emphasis on the dynamics of neutron stars and black holes. The team currently consists of two (2) postdoctoral researchers, three (3) PhD students, and seven (7) MSc students.

The successful applicant will carry out independent and original research on the dynamics of relativistic compact objects and the associated emission of gravitational and electromagnetic radiation. In addition, the successful applicant will be expected to contribute to teaching activities for four (4) hours per week.

Applications, including a curriculum vitae, a list of publications, a statement of research interests and experience, and the names (address, and email) of up to three potential referees, should be sent to:

Prof. Dr. Kostas Kokkotas

Theoretical Astrophysics (IAAT), University of Tübingen, D-72076 Tübingen, Germany

Please find here full details.

Postdoctoral Fellowship in Theoretical and Gravitational Wave Astrophysics at NBI Copenhagen

The Theoretical Astrophysics Group in the Niels Bohr International Academy (NBIA) at the Niels Bohr Institute invites expressions of interest for a 3-year postdoctoral fellowship at the interface between astrophysical fluid dynamics and gravitational wave astrophysics. The fall of 2026 would be the preferred starting date. Interested individuals are encouraged to submit all material using this website before January 7th, 2026 but the search will continue beyond this date. 

We are seeking highly motivated, outstanding individuals who will contribute and develop research programs related to the dynamics and observational signatures of compact binary mergers. Expertise in astrophysical fluid dynamics, magnetohydrodynamics, radiative transfer, gravitational wave astrophysics, and/or high-performance computing will constitute valuable assets. Group members have access to some of the largest dedicated astrophysics computer resources in Scandinavia, including a general-purpose cluster with more than 10,000 cores, a GPU cluster, a petabyte of storage, and dedicated data analysis servers.

Postdoctoral fellows are expected to carry out an independent research program and interact with other NBIA members. They have the opportunity to guide students, teach courses at various levels, participate in outreach activities, and organize international meetings and PhD schools.

The Niels Bohr International Academy fosters the traditions of internationalism, interdisciplinary science and excellence in physics which have characterized the Niels Bohr Institute for more than a century. The NBIA functions as a primary center for fundamental research including theoretical and computational astrophysics, particle astrophysics, gravitational physics, high energy particle physics, quantum physics, and biophysics.

The University of Copenhagen wishes to reflect the diversity of society and welcomes expressions of interest from all qualified individuals regardless of personal background.

If needed, specific inquiries can be addressed to nbia(at)nbi.ku.dk.

Please find here full details.

Research Fellow in Gravitational Wave Observations at the University of Birmingham

The Institute for Gravitational Wave Astronomy at the University of Birmingham, United Kingdom, invites applications for a fixed-term postdoctoral position in gravitational-wave astronomy from April 1, 2026 until September 30, 2028. The appointment may be extended depending on the availability of funds and comes with a generous travel budget.

The successful candidate will work with Dr Gregorio Carullo, Dr Geraint Pratten, Dr Patricia Schmidt and Prof Alberto Vecchio on topics including gravitational-wave data analysis and parameter estimation, analytical modelling of gravitational-wave sources, numerical relativity simulations of compact binaries, surrogate modelling and machine learning. 

The applicant is expected to have a PhD in physics or a related subject, with a background in data analysis techniques and analytical and/or numerical modelling of compact binaries. They will contribute to the activities of the LIGO Scientific Collaboration, and will also have the opportunity to join the LISA Consortium, the Einstein Telescope Collaboration, and the Cosmic Explorer Consortium. 

The Institute for Gravitational Wave Astronomy provides a vibrant and diverse environment with expertise across key areas of gravitational-wave astronomy: From theoretical to experimental gravitational-wave research, with applications to present and future-generation detectors, theoretical astrophysics, transient astronomy, gravitational-wave data analysis and source modelling, including numerical relativity and general relativity theory. The candidate will have the opportunity to engage in collaborative research within the Institute.

The University of Birmingham is an equal opportunity employer. The School of Physics and Astronomy is an Athena SWAN Silver Award holder and JUNO Champion, welcomes people from all backgrounds and is committed to fostering an inclusive environment where diversity is at the heart of who we are. We encourage applications from all qualified applicants; those from minority groups who are under-represented in this discipline are particularly welcome. 

Applications should include a CV, list of publications, and a statement of past and future research activities of two pages. The deadline for application is January 18th, 2026 for full consideration. 

Applications should be submitted through the University of Birmingham job portal at the link [1] (Research Fellow in Gravitational Waves – Physics and Astronomy – 106778 – Grade 7).

Applicants should also arrange for three reference letters to be sent to Ms Nicola Holloway (n.holloway[AT]bham.ac.uk) by the application deadline. Remote interviews are expected to take place in the period January 23rd to February 6th, 2026.

For further information and informal inquiries please contact Dr Gregorio Carullo (G.Carullo[AT]bham.ac.uk), Dr Geraint Pratten (G.Pratten[AT]bham.ac.uk), Dr Patricia Schmidt (P.Schmidt[AT]bham.ac.uk) and Prof Alberto Vecchio (A.Vecchio[AT]bham.ac.uk).

Please find here details.

Positions in GW lensing at IFT Madrid

We invite applications for PhD and Postdoctoral positions at the Instituto de Física Teórica (IFT UAM–CSIC, Madrid) in the areas of gravitational waves, gravitational lensing, and fundamental physics. Positions are funded by the ERC Consolidator Grant GLOW, CSIC-MAX, and Atracción de Talento programs. Starting date is October 2026 or later. 

Successful candidates will work with Miguel Zumalacárregui (joining IFT in Summer 2026). Research topics include:

  • Wave-optics phenomena in gravitational lensing
  • Searches for lensed gravitational waves (data analysis, machine learning…)
  • Gravitational lensing of stars by binary black holes
  • Tests of dark matter, dark energy and modified gravity

We are looking for creative and highly motivated individuals with interest or experience in cosmology, gravitational lensing, gravitational waves, compact-object astrophysics, data analysis, and/or computational methods. Expertise in these topics is not a prerequisite: candidates with strong motivation and willingness to acquire the relevant skills are encouraged to apply.

IFT is a Severo Ochoa Center of Excellence with a vibrant international community, active visitor programs, and strong research in cosmology, gravitation, high-energy and astroparticle physics. The group is involved in the Euclid and LISA missions and maintains collaborations with AEI (Potsdam), IAS (Princeton), Oxford, NBI Copenhagen, and UC Berkeley.

IFT is an equal-opportunity employer. Applications from women and underrepresented groups are strongly encouraged.

POSTDOC POSITIONS:

Application link: https://calls.ift.uam-csic.es/convocatoria/NTY=

We seek creative and independent researchers with experience in gravitational waves, gravitational lensing, cosmology, astrophysics, or related fields. Applicants must hold a PhD in Physics (or equivalent) by the starting date. Positions are typically 2–3 years with competitive salary, travel funding, and support for collaboration visits.
Review of applications will begin on December 15 and continue until the positions are filled.

PhD POSITIONS:

Application link: https://calls.ift.uam-csic.es/convocatoria/NTk=

Applicants must hold, or be close to completing, a Master’s degree in Physics or a closely related field, as required for enrollment in the UAM PhD program and for Spanish predoctoral contracts. Students will have opportunities to develop independent research directions and participate in international collaborations.
Review of applications will begin on January 10th and continue until the positions are filled.

Please feel free to distribute this announcement.

For inquiries, contact: miguel.zumalacarregui(at)aei.mpg.de

Postdoc in Theoretical/Numerical Cosmology in Montpellier

The Particles, Astroparticles & Cosmology Theory (PACT) group at LUPM (Université de Montpellier, France / CNRS) invites applications for a postdoctoral position in the field of Theoretical/Numerical Cosmology. Particular emphasis will be laid on the study of the evolution and observational signatures or primordial magnetic fields, analysis of cosmic tensions such as the Hubble tension, mining of cosmic CMB and BAO data, and possibly the study of primordial black holes and gravitational waves. Application deadline: January 31st, 2026.

LUPM pursues a broad research agenda at the interface of particle physics and cosmology. Key activities include dark matter, early Universe physics, cosmological tensions, gravitational lensing, and high-energy phenomenology. Permanent members of LUPM are Felix Bruemmer, Pierre Fleury, Cyril Hugonie, Karsten Jedamzik, Julien Larena, Julien Lavalle, Gilbert Moultaka, Vivian Poulin, and Theo Simon. There are furthermore a number of post-docs and students, providing an altogether very lively and accommodating work climate.

Candidate Profile
We are looking for candidates with:

  • a PhD (or nearing completion) in theoretical cosmology, astroparticle physics, and/or numerical magneto-hydrodynamics
  • possibly background in early-Universe physics
  • possible experience with analytical and/or numerical methods (e.g., MHD simulations, Boltzmann codes, MCMC)
  • ability to work both independently and collaboratively within a research group.
  • good communication skills in English (French is not required)

The candidate is also expected to collaborate with Karsten Jedamzik.

Please find here details.

Postdoctoral position in GW cosmology at ICG, University of Portsmouth

This postdoctoral position will focus on testing dark energy and modified gravity models with cosmological observations. Two aspects of this are of interest for this position, candidates are welcome via either route:

i) Linking simulations of large-scale structure (LSS) in modified gravity theories to observables relevant to stage IV surveys. Relevant skills include: experience with running and handling outputs from numerical simulations of LSS. Experience constructing emulators. Experience with forecasting and/or data analysis of galaxy clustering and weak lensing observables. Experience with HOD modelling. Other experience in constraining gravity with LSS will be considered.

ii) Testing gravity through the association of gravitational waves (GWs) and galaxies, e.g. dark sirens, GW-galaxy cross-correlation. Relevant skills include: experience with dark sirens software pipelines (e.g. gwcosmo, IcaroGW, CHIMERA…). Experience with GW x LSS cross-correlation computations. Experience with forecasting for 3G GW detectors. Other experience in GW cosmology will be considered.

Application deadline: 02/01/2026

The successful candidate will join the research team of Prof. Tessa Baker, and contribute to the ERC-funded SHADE project. Queries on the post can be directed to tessa.baker@port.ac.uk.

The working pattern for this post is full-time. Whilst there is a need to be in Portsmouth a few days a week, hybrid working is available for this role.

The interviews are currently anticipated to be held on 19 January 2025.

This appointment is a fixed-term contract for 12 months.

Applications (application form, CV, publication list and research proposal for the fellowship) should be submitted by the closing date. Applicants should also arrange for three letters of recommendation to be sent by email to icg-recruitment(at)port.ac.uk, to arrive by the same date.

Please find here full details.

Postdoc position at the University of Texas Rio Grande Valley

The South Texas Space Science Institute (STSSI) at the University of Texas Rio Grande Valley (UTRGV) in Brownsville, TX announces the opening of one postdoctoral appointment in space science research, broadly defined. The successful candidate is expected to actively contribute to and expand the current research activities at UTRGV in space science technology development, gravitational-wave (GW) astronomy, optical and radio astronomy, or experimental GW detector development. The STSSI is an interdisciplinary institute with active research in various areas of space and astrophysical science (https://www.utrgv.edu/stssi/). We are particularly interested in hiring creative and motivated candidates who are at ease working both collaboratively and independently in a vibrant, interdisciplinary and synergistic group.

Specifically, we are looking for the strongest possible candidate to collaborate on research projects with members of STSSI in the areas of gravitational-wave astronomy (data analysis or source modeling), optical and radio astronomy, experimental GW detector development, or technology development with space applications. Current experimental research areas within STSSI include phased array development (with applications in spacecraft communication and radio astronomy); testing of materials, electronics, and systems in a simulated space environment; and laser systems for space communication, precision metrology, and gravity gradiometry (including applications for space and ground-based gravitational-wave detectors).

Applicants must have a Ph.D. in Physics or a related field, and a strong interest in leading research efforts as part of STSSI. The postdoc will also have ample opportunity to assist in the supervision of undergraduate and graduate students involved in STSSI research projects.

Appointment is for 2 years with annual renewal contingent upon satisfactory progress and funding status. The anticipated start date of the positions is either Summer or Fall 2026. Applications will be considered until the position is filled. Interested candidates should apply through the job portal (posting number SRGV8615): https://careers.utrgv.edu/postings/49123

Applicants should submit a cover letter, curriculum vitae, and research statement in job portal.

Applicants should also arrange to have three letters of recommendation emailed directly to Dr. Joseph Romano at joseph.romano@utrgv.edu prior to the application deadline.

Candidates are encouraged to apply as soon as possible. The deadline for full consideration is set for December 15, 2025. This deadline may be subject to extension, if necessary.

For all application related questions, please contact Dr. Joseph Romano at joseph.romano(at)utrgv.edu.

Review of applications will start January 15, 2026 and continue until the position is filled.

Pease find here details.

LIGO Scientific Collaboration Postdoctoral Position in the CGCA at UWM

The Leonard E. Parker Center for Gravitation, Cosmology, and Astrophysics (CGCA) at the University of Wisconsin-Milwaukee (UWM) invites applications for a postdoctoral position working with Prof. Brady and Prof. Creighton on research in gravitational wave physics and astronomy within the LIGO Scientific Collaboration.

The initial appointment is for one year, with renewal for a second (and, in most cases, a third) year contingent on continued funding and satisfactory performance. This position includes competitive salary and excellent fringe benefits. Applicants should have a PhD in physics, astrophysics, or a related field.
The CGCA at UWM has active research efforts in astronomy, astrophysics, gravity, and cosmology, with membership in the LIGO Scientific Collaboration, NANOGrav, the Event Horizon Telescope, and more. The core group is comprised of 8 faculty (Brady, Chang, Creighton, Erb, Kaplan, Medeiros, Vigeland and Wiseman), plus a number of scientists, postdocs, and graduate students.

Applicants should send a C.V., publication list, and a brief statement of their research interests by email to cgca-postdoc-applications(at)uwm.edu. Please include “LIGO” in the subject line of your email. Applicants should also arrange to have three letters of recommendation sent by e-mail to the above address. Review of applications will begin on 23 January 2026. Questions should also be sent to the above address, with “LIGO” included in the subject.

The University of Wisconsin – Milwaukee is an Equal Opportunity, Affirmative Action Employer.

Please find here details.

ETpathfinder Visiting Scientists Programme Open For Applications

The ETpathfinder Visiting Scientists Programme provides funding to welcome researchers and engineers to our ETpathfinder R&D facility in Maastricht, the Netherlands. This program is designed for senior scientists and engineers, postdoctoral researchers and experienced PhD students who wish to engage with cutting-edge interferometric technology while contributing their expertise to advance our experimental capabilities.

ETpathfinder serves as a R&D fieldlab facility for developing technologies that will enable future -generation gravitational wave detectors, such as Einstein Telescope. Our research focuses on high-precision interferometry with cryogenic silicon test masses, seismic isolation systems, optics, photonics, quantum noise reduction, controls and environmental monitoring as well as on engineering, systems engineering, integration and cleanliness aspects.

For any questions or enquiries, please contact us via etpf-visiting-scientist-prog(at)nikhef.nl

Applications can be submitted via this webpage.