Offer Description
The Theory Pole of the IJCLab opens a call for a postdoctoral position. The fellowship is funded by CNRS IN2P3 for a duration of two years, starting in the Fall 2026. The appointment is foreseen in the area of particle physics; applicants with expertise in Beyond the Standard Model (BSM) phenomenology, model building, and flavour physics (leptons & quarks) in the SM and beyond are invited to apply. At the starting date, applicants should already hold a Ph.D. and preferably have some postdoctoral experience (up to 3 years).
The successful candidate is expected to work on particle physics theory and phenomenology in the flavor sector, in connection with current experiments at Belle‑II and LHCb, as well as various experiments in the lepton sector.
The Irène Joliot‑Curie Physics Laboratory of 2 Infinities (IJCLab) is a UMR under the supervision of the CNRS (IN2P3), the University of Paris‑Saclay and the University of Paris. It is located on the campus of the University of Paris‑Saclay in Orsay, 20 km south of Paris and easily accessible by RER in 35 min. IJCLab was created in 2020 from the merger of five units (CSNSM, IMNC, IPN, LAL, LPT). The staff consists of nearly 560 permanent staff and approximately 200 non‑permanent, including 120 doctoral students. Research themes include nuclear physics, high‑energy physics, theoretical physics, astroparticles, astrophysics and cosmology, particle accelerators, energy and the environment and health. The laboratory has significant technical capacities in all major fields required to design and develop experimental devices and instruments.
The researcher will work on the Flavor Physics team of the Theory pole of IJCLab, with possible transverse activities with the QCD and BSM groups.
Qualifications and requirements

Expertise in BSM phenomenology, Effective Field Theories, and/or flavour and collider physics.
Fluent English, both written and spoken.
Collaborative work.
Programming skills (Mathematica).

Hiring policy
IJCLAB bases its recruitment policy on the promotion of equality, diversity, and inclusion. These core values support the professional development of staff and the growth and development of the laboratory.
Application requirements
The application requires a short CV, a research statement (2 pages max) and a list of publications, in a single PDF file. Applicants should also arrange for 2 or 3 letters of reference to be submitted before 10 Dec 2025 to the address postdoc.th.ijclab.in2p3@gmail.com indicating in the subject line “Name‑of‑the‑applicant-Postdoc TH‑ANR 2026”. The closing date for receipt of applications is 10 Dec 2025.
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