If you are currently employed in academia and would like to work within the Aquila consortium, please get in touch with us through this form or reach out to individual members to discuss potential collaborations.
We have opportunities for people interested in joining our institutions, at different levels of seniority:
- Bachelor and Master projects, for internships at the Bachelor or Master level,
- PhD projects, for longer projects leading to a PhD in cosmology and/or data science,
- Postdoctoral positions and Fellowships, if you hold a PhD degree in a relevant field (including astronomy, statistics, or computer science),
- Faculty positions, if you are looking for a permanent academic position in one of our institutions.
Bachelor and Master projects
We continually have opportunities for Bachelor and Master projects in our different institutions, which we typically discuss directly with candidates. Please choose the person you would like to work with and make direct contact by email.
Institut d’Astrophysique de Paris
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October 2025: Internship: Tessellations in cosmological N-body simulations
Tessellation techniques are widely used in observational and computational cosmology to adaptively sample sets of data points while controlling signal-to-noise ratio. They are useful to analyze the morphology of the observed large-scale galaxy distribution (e.g., the Euclid survey, which represents the main collaborative framework of this project, but also DESI, LSST, etc.), or simply for obtaining accurate estimates of the local density and velocity field in the dark matter distribution generated from a N-body simulation, for subsequent post-processing to create simulated observations, such as synthetic Lyman-alpha forests (e.g., DESI), virtual galaxy catalogs (notably Euclid, but also DESI, LSST), or mock gamma-ray sky surveys for indirect detection of dark matter (e.g., Fermi LAT). However, tessellation methods are still not free of noise and usually require additional processing to obtain a smoother representation of the data. In particular, an important challenge is to be able to accurately measure the velocity field and its spatial derivatives in a cosmological N-body simulation. Here we propose to do so by applying a local adaptive convolution to the tessellation network, which can be performed directly with the appropriate percolation algorithm, and to test the ability of such an algorithm to generate smooth velocity fields and their derivatives, with comparisons to methods already existing in the literature.
Further reading: Bernardeau F. & Van de Weygaert, 1996, Cappellari M, Copin Y., 2002, Hahn O, Angulo R., Abel T., 2015, Saga S., Taruya A., Colombi S., 2022.
Keywords: Numerical simulations, Modelling
Requirements: Python, C or C++ or F90, fluent in English
Start date and duration: 9 March 2026, for ~4 months
Contact/apply: Please provide a CV and transcripts to Guilhem Lavaux (guilhem.lavaux@iap.fr) and Stéphane Colombi (colombi@iap.fr)
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October 2025: Internship: C++ HPC developer for a simulation code for large-scale structure formation in cosmology
We are looking for an intern interested in high-performance computing to assist with porting the Simbelmynë code to C++ and GPU computing using the Kokkos framework. Full details (in French) are available here.
Requirements: C++, Python, Git, notions of high-performance computing
Start date and duration: from February 2026 for up to 6 months
Contact/apply: Please provide a CV, cover letter and transcripts to Guillaume Tcherniatinsky (tchernia@iap.fr), Florent Leclercq (florent.leclercq@iap.fr) and Guilhem Lavaux (guilhem.lavaux@iap.fr)
PhD projects
Institut d’Astrophysique de Paris
- We currently do not have formal openings, but please contact faculty members (Guilhem Lavaux, Florent Leclercq) who may have special opportunities.
Postdoctoral positions and Fellowships
CEA Saclay, CosmoStat group
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October 2025: Postdoctoral Position in Field-Level Inference of Weak Lensing
As part of the ERC-funded OCAPi project, we invite applications to work on field-level inference of cosmic shear and apply it to Euclid’s weak lensing data. Details about this position can be found here.
Application deadline: 15 December 2025
Stockholm University
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September 2025: Postdoctoral Fellows in Machine Learning for Astrophysics & Cosmology
The Physics Department at Stockholm University invites applications for postdoctoral positions. We are looking for researchers with expertise in computational, theoretical, or observational projects to advance and apply state-of-the-art machine learning and AI methods in astrophysics and cosmology. Please see this page.
Imperial College London
- The Imperial Astrophysics group is interested in hearing from potential candidates to various fellowship opportunities. Please see this page.
Institut d’Astrophysique de Paris
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November 2025: Postdoctoral Researcher in Cosmological Modelling and Inference
The Institut d’Astrophysique de Paris (IAP) invites applications for a two-year postdoctoral position in cosmological modelling and inference. See the full position description and application instructions here.
Contact for informal enquiries: Florent Leclercq (florent.leclercq@iap.fr) and Guilhem Lavaux (guilhem.lavaux@iap.fr)
Application deadline: 15 January 2026, including letters of recommendation
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October 2025: Postdoctoral Researcher in Cosmology
We have an open three-year postdoctoral position in artificial intelligence and cosmological data analysis at the IAP.
The successful candidate will join this vibrant team to develop and apply simulation-based Bayesian and AI methods for the scientific exploitation of Euclid early data releases, in particular galaxy clustering, and to produce synthetic galaxy catalogs. The position is a 36-month fixed-term contract (full-time) with a negotiable start date that must occur before the end of 2026. The gross monthly salary ranges from €2,800 to €3,500, depending on qualifications.
The working language of the team is English. Applicants must hold a PhD in physics, astrophysics or a closely related field and have no more than three years of postdoctoral experience (or equivalent research experience). We seek candidates with strong expertise in cosmology, Bayesian statistics and/or data-driven methods, and excellent scientific writing and presentation skills in English. Experience with high-performance computing or machine learning is a plus.
Please submit a CV, cover letter, list of publications, an approximately three-page research proposal, and up to three letters of recommendation via the online portal: https://shlink.aquila-consortium.org/postdoc-iap-apply. Direct any enquiries to Guilhem Lavaux (guilhem.lavaux@iap.fr) and Florent Leclercq (florent.leclercq@iap.fr).
Further information about the IAP and the research group is available at https://www.iap.fr and at the Aquila Consortium website. The IAP offers excellent computational resources, a stimulating interdisciplinary environment, generous travel funding, flexible working hours and a strong commitment to equality, diversity and inclusion.
Application deadline: 1 January 2026, including letters of recommendation
Max Planck Institute for Astrophysics
- The regular postdoctoral programme at MPA is announced annually in the fall on the AAS job register.
Faculty positions
Institut d’Astrophysique de Paris
- The CNRS and the CNAP have annual calls for senior permanent positions. The competition is nationwide and open to anyone. It is advisable to reach out to local staff to learn more about how to obtain support. Please see this page.
- Sorbonne Université occasionally advertises lectureships to work at the IAP.